diff --git a/examples/ui_style_test/main.c b/examples/ui_style_test/main.c
index 743408e..2149f7a 100644
--- a/examples/ui_style_test/main.c
+++ b/examples/ui_style_test/main.c
@@ -450,7 +450,7 @@ int main()
 							ui_style_next(&(ui_style){.size.width = {UI_SIZE_PIXELS, 300},
 					                          		.size.height = {UI_SIZE_TEXT}},
 					              		UI_STYLE_SIZE);
-							static str8 text = {};
+							static str8 text = {0};
 							ui_text_box_result res = ui_text_box("textbox", mem_scratch(), text);
 							if(res.changed)
 							{
diff --git a/src/glsl_shaders.h b/src/glsl_shaders.h
index f61d119..6745a33 100644
--- a/src/glsl_shaders.h
+++ b/src/glsl_shaders.h
@@ -2,7 +2,7 @@
 *
 *	file: glsl_shaders.h
 *	note: string literals auto-generated by embed_text.py
-*	date: 03/032023
+*	date: 09/032023
 *
 **********************************************************************/
 #ifndef __GLSL_SHADERS_H__
@@ -35,11 +35,13 @@ const char* glsl_blit_vertex =
 "\n"
 "void main()\n"
 "{\n"
+"	/* generate (0, 0) (1, 0) (1, 1) (1, 1) (0, 1) (0, 0)*/\n"
+"\n"
 "    float x = float(((uint(gl_VertexID) + 2u) / 3u)%2u);\n"
 "    float y = float(((uint(gl_VertexID) + 1u) / 3u)%2u);\n"
 "\n"
 "    gl_Position = vec4(-1.0f + x*2.0f, -1.0f+y*2.0f, 0.0f, 1.0f);\n"
-"    uv = vec2(x, y);\n"
+"    uv = vec2(x, 1-y);\n"
 "}\n";
 
 //NOTE: string imported from src\glsl_shaders\blit_fragment.glsl
diff --git a/src/glsl_shaders/blit_vertex.glsl b/src/glsl_shaders/blit_vertex.glsl
index 063dc03..a88b757 100644
--- a/src/glsl_shaders/blit_vertex.glsl
+++ b/src/glsl_shaders/blit_vertex.glsl
@@ -5,9 +5,11 @@ out vec2 uv;
 
 void main()
 {
+	/* generate (0, 0) (1, 0) (1, 1) (1, 1) (0, 1) (0, 0)*/
+
     float x = float(((uint(gl_VertexID) + 2u) / 3u)%2u);
     float y = float(((uint(gl_VertexID) + 1u) / 3u)%2u);
 
     gl_Position = vec4(-1.0f + x*2.0f, -1.0f+y*2.0f, 0.0f, 1.0f);
-    uv = vec2(x, y);
+    uv = vec2(x, 1-y);
 }
diff --git a/src/ui.c b/src/ui.c
index a22e87e..b07a68b 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -6,6 +6,7 @@
 *	@revision:
 *
 *****************************************************************/
+#include"platform.h"
 #include"memory.h"
 #include"hash.h"
 #include"platform_clock.h"
@@ -33,7 +34,7 @@ static ui_style UI_STYLE_DEFAULTS =
 // context
 //-----------------------------------------------------------------------------
 
-const u32 UI_MAX_INPUT_CHAR_PER_FRAME = 64;
+enum { UI_MAX_INPUT_CHAR_PER_FRAME = 64 };
 
 typedef struct ui_input_text
 {
@@ -60,7 +61,7 @@ typedef struct ui_tag_elt
 	ui_tag tag;
 } ui_tag_elt;
 
-const u64 UI_BOX_MAP_BUCKET_COUNT = 1024;
+enum { UI_BOX_MAP_BUCKET_COUNT = 1024 };
 
 typedef struct ui_context
 {
@@ -94,8 +95,8 @@ typedef struct ui_context
 
 } ui_context;
 
-__thread ui_context __uiThreadContext = {0};
-__thread ui_context* __uiCurrentContext = 0;
+mp_thread_local ui_context __uiThreadContext = {0};
+mp_thread_local ui_context* __uiCurrentContext = 0;
 
 ui_context* ui_get_context(void)
 {
@@ -240,7 +241,7 @@ ui_key ui_key_make_str8(str8 string)
 		seed = parent->key.hash;
 	}
 
-	ui_key key = {};
+	ui_key key = {0};
 	key.hash = mp_hash_aes_string_seed(string, seed);
 	return(key);
 }
@@ -1909,7 +1910,7 @@ ui_sig ui_menu_button(const char* name)
 	              |UI_STYLE_LAYOUT_MARGIN_X
 	              |UI_STYLE_BG_COLOR);
 
-	ui_pattern pattern = {};
+	ui_pattern pattern = {0};
 	ui_pattern_push(&ui->frameArena, &pattern, (ui_selector){.kind = UI_SEL_STATUS, .status = UI_HOVER});
 
 	ui_style style = {.bgColor = {0, 0, 1, 1}};
@@ -1937,7 +1938,7 @@ str32 ui_edit_replace_selection_with_codepoints(ui_context* ui, str32 codepoints
 	str32 before = str32_slice(codepoints, 0, start);
 	str32 after = str32_slice(codepoints, end, codepoints.len);
 
-	str32_list list = {};
+	str32_list list = {0};
 	str32_list_push(&ui->frameArena, &list, before);
 	str32_list_push(&ui->frameArena, &list, input);
 	str32_list_push(&ui->frameArena, &list, after);
diff --git a/src/ui.h b/src/ui.h
index fda363a..6434676 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -327,24 +327,24 @@ typedef struct ui_context ui_context;
 //-------------------------------------------------------------------------------------
 // UI context initialization and frame cycle
 //-------------------------------------------------------------------------------------
-void ui_init(void);
-ui_context* ui_get_context(void);
-void ui_set_context(ui_context* context);
+MP_API void ui_init(void);
+MP_API ui_context* ui_get_context(void);
+MP_API void ui_set_context(ui_context* context);
 
-void ui_begin_frame(ui_style* defaultStyle, ui_style_mask mask);
-void ui_end_frame(void);
-void ui_draw(void);
+MP_API void ui_begin_frame(ui_style* defaultStyle, ui_style_mask mask);
+MP_API void ui_end_frame(void);
+MP_API void ui_draw(void);
 
 #define ui_frame(s, m) defer_loop(ui_begin_frame((s), (m)), ui_end_frame())
 
 //-------------------------------------------------------------------------------------
 // Box keys
 //-------------------------------------------------------------------------------------
-ui_key ui_key_make_str8(str8 string);
-ui_key ui_key_make_path(str8_list path);
+MP_API ui_key ui_key_make_str8(str8 string);
+MP_API ui_key ui_key_make_path(str8_list path);
 
-ui_box* ui_box_lookup_key(ui_key key);
-ui_box* ui_box_lookup_str8(str8 string);
+MP_API ui_box* ui_box_lookup_key(ui_key key);
+MP_API ui_box* ui_box_lookup_str8(str8 string);
 
 // C-string helper
 #define ui_key_make(s) ui_key_make_str8(STR8(s))
@@ -353,17 +353,17 @@ ui_box* ui_box_lookup_str8(str8 string);
 //-------------------------------------------------------------------------------------
 // Box hierarchy building
 //-------------------------------------------------------------------------------------
-ui_box* ui_box_make_str8(str8 string, ui_flags flags);
-ui_box* ui_box_begin_str8(str8 string, ui_flags flags);
+MP_API ui_box* ui_box_make_str8(str8 string, ui_flags flags);
+MP_API ui_box* ui_box_begin_str8(str8 string, ui_flags flags);
 
-ui_box* ui_box_end(void);
+MP_API ui_box* ui_box_end(void);
 #define ui_container(name, flags) defer_loop(ui_box_begin(name, flags), ui_box_end())
 
-void ui_box_push(ui_box* box);
-void ui_box_pop(void);
-ui_box* ui_box_top(void);
+MP_API void ui_box_push(ui_box* box);
+MP_API void ui_box_pop(void);
+MP_API ui_box* ui_box_top(void);
 
-void ui_box_set_render_proc(ui_box* box, ui_box_render_proc proc, void* data);
+MP_API void ui_box_set_render_proc(ui_box* box, ui_box_render_proc proc, void* data);
 
 // C-string helpers
 #define ui_box_lookup(s) ui_box_lookup_str8(STR8(s))
@@ -373,24 +373,24 @@ void ui_box_set_render_proc(ui_box* box, ui_box_render_proc proc, void* data);
 //-------------------------------------------------------------------------------------
 // Box status and signals
 //-------------------------------------------------------------------------------------
-bool ui_box_closed(ui_box* box);
-void ui_box_set_closed(ui_box* box, bool closed);
+MP_API bool ui_box_closed(ui_box* box);
+MP_API void ui_box_set_closed(ui_box* box, bool closed);
 
-bool ui_box_active(ui_box* box);
-void ui_box_activate(ui_box* box);
-void ui_box_deactivate(ui_box* box);
+MP_API bool ui_box_active(ui_box* box);
+MP_API void ui_box_activate(ui_box* box);
+MP_API void ui_box_deactivate(ui_box* box);
 
-bool ui_box_hot(ui_box* box);
-void ui_box_set_hot(ui_box* box, bool hot);
+MP_API bool ui_box_hot(ui_box* box);
+MP_API void ui_box_set_hot(ui_box* box, bool hot);
 
-ui_sig ui_box_sig(ui_box* box);
+MP_API ui_sig ui_box_sig(ui_box* box);
 
 //-------------------------------------------------------------------------------------
 // Tagging
 //-------------------------------------------------------------------------------------
-ui_tag ui_tag_make_str8(str8 string);
-void ui_tag_box_str8(ui_box* box, str8 string);
-void ui_tag_next_str8(str8 string);
+MP_API ui_tag ui_tag_make_str8(str8 string);
+MP_API void ui_tag_box_str8(ui_box* box, str8 string);
+MP_API void ui_tag_next_str8(str8 string);
 
 // C-string helpers
 #define ui_tag_make(s) ui_tag_make_str8(STR8(s))
@@ -403,15 +403,15 @@ void ui_tag_next_str8(str8 string);
 //NOTE: styling API
 //WARN: You can use a pattern in multiple rules, but be aware that a pattern is references an underlying list of selectors,
 //      hence pushing to a pattern also modifies rules in which the pattern was previously used!
-void ui_apply_style_with_mask(ui_style* dst, ui_style* src, ui_style_mask mask);
+MP_API void ui_apply_style_with_mask(ui_style* dst, ui_style* src, ui_style_mask mask);
 
-void ui_pattern_push(mem_arena* arena, ui_pattern* pattern, ui_selector selector);
-ui_pattern ui_pattern_all(void);
-ui_pattern ui_pattern_owner(void);
+MP_API void ui_pattern_push(mem_arena* arena, ui_pattern* pattern, ui_selector selector);
+MP_API ui_pattern ui_pattern_all(void);
+MP_API ui_pattern ui_pattern_owner(void);
 
-void ui_style_next(ui_style* style, ui_style_mask mask);
-void ui_style_match_before(ui_pattern pattern, ui_style* style, ui_style_mask mask);
-void ui_style_match_after(ui_pattern pattern, ui_style* style, ui_style_mask mask);
+MP_API void ui_style_next(ui_style* style, ui_style_mask mask);
+MP_API void ui_style_match_before(ui_pattern pattern, ui_style* style, ui_style_mask mask);
+MP_API void ui_style_match_after(ui_pattern pattern, ui_style* style, ui_style_mask mask);
 
 //-------------------------------------------------------------------------
 // Basic widget helpers
@@ -426,30 +426,27 @@ enum {
 	UI_STYLE_TAG_MENU
 };
 
-ui_sig ui_label(const char* label);
+MP_API ui_sig ui_label(const char* label);
+MP_API ui_sig ui_button(const char* label);
+MP_API ui_box* ui_slider(const char* label, f32 thumbRatio, f32* scrollValue);
 
-ui_sig ui_button(const char* label);
-
-ui_box* ui_slider(const char* label, f32 thumbRatio, f32* scrollValue);
-ui_box* ui_scrollbar(const char* label, f32 thumbRatio, f32* scrollValue);
-
-void ui_panel_begin(const char* name, ui_flags flags);
-void ui_panel_end(void);
+MP_API void ui_panel_begin(const char* name, ui_flags flags);
+MP_API void ui_panel_end(void);
 #define ui_panel(s, f) defer_loop(ui_panel_begin(s, f), ui_panel_end())
 
-ui_sig ui_tooltip_begin(const char* name);
-void ui_tooltip_end(void);
+MP_API ui_sig ui_tooltip_begin(const char* name);
+MP_API void ui_tooltip_end(void);
 #define ui_tooltip(name) defer_loop(ui_tooltip_begin(name), ui_tooltip_end())
 
-void ui_menu_bar_begin(const char* label);
-void ui_menu_bar_end(void);
+MP_API void ui_menu_bar_begin(const char* label);
+MP_API void ui_menu_bar_end(void);
 #define ui_menu_bar(name) defer_loop(ui_menu_bar_begin(name), ui_menu_bar_end())
 
-void ui_menu_begin(const char* label);
-void ui_menu_end(void);
+MP_API void ui_menu_begin(const char* label);
+MP_API void ui_menu_end(void);
 #define ui_menu(name) defer_loop(ui_menu_begin(name), ui_menu_end())
 
-ui_sig ui_menu_button(const char* name);
+MP_API ui_sig ui_menu_button(const char* name);
 
 typedef struct ui_text_box_result
 {
@@ -459,7 +456,7 @@ typedef struct ui_text_box_result
 
 }ui_text_box_result;
 
-ui_text_box_result ui_text_box(const char* name, mem_arena* arena, str8 text);
+MP_API ui_text_box_result ui_text_box(const char* name, mem_arena* arena, str8 text);
 
 #ifdef __cplusplus
 } // extern "C"
diff --git a/src/wgl_surface.c b/src/wgl_surface.c
index 43a82d7..e21019b 100644
--- a/src/wgl_surface.c
+++ b/src/wgl_surface.c
@@ -176,7 +176,7 @@ void* mg_wgl_get_proc(const char* name)
 
 mg_surface_data* mg_wgl_surface_create_for_window(mp_window window)
 {
-	mg_surface* surface = 0;
+	mg_wgl_surface* surface = 0;
 
 	mp_window_data* windowData = mp_window_ptr_from_handle(window);
 	if(windowData)
@@ -184,7 +184,7 @@ mg_surface_data* mg_wgl_surface_create_for_window(mp_window window)
 		wgl_init();
 
 		//NOTE: fill surface data and load api
-		mg_wgl_surface* surface = malloc_type(mg_wgl_surface);
+		surface = malloc_type(mg_wgl_surface);
 		if(surface)
 		{
 			mg_surface_init_for_window((mg_surface_data*)surface, windowData);
diff --git a/src/win32_app.c b/src/win32_app.c
index 206dc17..91e5f07 100644
--- a/src/win32_app.c
+++ b/src/win32_app.c
@@ -177,9 +177,9 @@ static mp_key_code mp_convert_win32_key(int code)
 	return(__mpApp.keyCodes[code]);
 }
 
-static mp_key_mods mp_get_mod_keys()
+static mp_keymod_flags mp_get_mod_keys()
 {
-	mp_key_mods mods = 0;
+	mp_keymod_flags mods = 0;
 	if(GetKeyState(VK_SHIFT) & 0x8000)
 	{
 		mods |= MP_KEYMOD_SHIFT;
@@ -218,7 +218,7 @@ static void process_mouse_event(mp_window_data* window, mp_key_action action, mp
 		}
 	}
 
-	mp_update_key_state(&__mpApp.inputState.mouse.buttons[button], action == MP_KEY_PRESS);
+	mp_update_key_state(&__mpApp.inputState.mouse.buttons[button], action);
 	//TODO click/double click
 
 	mp_event event = {0};
@@ -236,7 +236,7 @@ static void process_wheel_event(mp_window_data* window, f32 x, f32 y)
 	mp_event event = {0};
 	event.window = mp_window_handle_from_ptr(window);
 	event.type = MP_EVENT_MOUSE_WHEEL;
-	event.move.deltaX = -x/30.0f;
+	event.move.deltaX = x/30.0f;
 	event.move.deltaY = y/30.0f;
 	event.move.mods = mp_get_mod_keys();
 
@@ -385,7 +385,7 @@ LRESULT WinProc(HWND windowHandle, UINT message, WPARAM wParam, LPARAM lParam)
 			event.window = mp_window_handle_from_ptr(mpWindow);
 			event.type = MP_EVENT_MOUSE_MOVE;
 			event.move.x = LOWORD(lParam) / scaling;
-			event.move.y = (rect.bottom - HIWORD(lParam)) / scaling;
+			event.move.y = HIWORD(lParam) / scaling;
 
 			if(__mpApp.inputState.mouse.posValid)
 			{
@@ -414,8 +414,8 @@ LRESULT WinProc(HWND windowHandle, UINT message, WPARAM wParam, LPARAM lParam)
 				                  .move.y = event.move.y};
 				mp_queue_event(&enter);
 			}
-			__mpApp.inputState.mouse.pos.x = event.move.x;
-			__mpApp.inputState.mouse.pos.y = event.move.y;
+
+			mp_update_mouse_move(event.move.x, event.move.y, event.move.deltaX, event.move.deltaY);
 
 			mp_queue_event(&event);
 		} break;
@@ -515,13 +515,14 @@ void mp_request_quit()
 
 void mp_pump_events(f64 timeout)
 {
+	__mpApp.inputState.frameCounter++;
+
 	MSG message;
 	while(PeekMessage(&message, 0, 0, 0, PM_REMOVE))
 	{
 		TranslateMessage(&message);
 		DispatchMessage(&message);
 	}
-	__mpApp.inputState.frameCounter++;
 }
 
 //--------------------------------------------------------------------
@@ -777,6 +778,33 @@ mp_rect mp_window_get_content_rect(mp_window window)
 	return(rect);
 }
 
+//--------------------------------------------------------------------------------
+// clipboard functions
+//--------------------------------------------------------------------------------
+
+MP_API void mp_clipboard_clear(void)
+{
+	//TODO
+}
+
+MP_API void mp_clipboard_set_string(str8 string)
+{
+	//TODO
+}
+
+MP_API str8 mp_clipboard_get_string(mem_arena* arena)
+{
+	//TODO
+	return((str8){0});
+}
+
+MP_API str8 mp_clipboard_copy_string(str8 backing)
+{
+	//TODO
+	return((str8){0});
+}
+
+
 //--------------------------------------------------------------------------------
 // win32 surfaces
 //--------------------------------------------------------------------------------
@@ -869,6 +897,18 @@ void mg_surface_cleanup(mg_surface_data* surface)
 	DestroyWindow(surface->layer.hWnd);
 }
 
+LRESULT LayerWinProc(HWND windowHandle, UINT message, WPARAM wParam, LPARAM lParam)
+{
+	if(message == WM_NCHITTEST)
+	{
+		return(HTTRANSPARENT);
+	}
+	else
+	{
+		return(DefWindowProc(windowHandle, message, wParam, lParam));
+	}
+}
+
 void mg_surface_init_for_window(mg_surface_data* surface, mp_window_data* window)
 {
 	surface->contentsScaling = mg_win32_surface_contents_scaling;
@@ -880,7 +920,7 @@ void mg_surface_init_for_window(mg_surface_data* surface, mp_window_data* window
 
 	//NOTE(martin): create a child window for the surface
 	WNDCLASS layerWindowClass = {.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC,
-		                         .lpfnWndProc = DefWindowProc,
+		                         .lpfnWndProc = LayerWinProc,
 		                         .hInstance = GetModuleHandleW(NULL),
 		                         .lpszClassName = "layer_window_class",
 		                         .hCursor = LoadCursor(0, IDC_ARROW)};