Added more DWMAPI bindings

core/sys/windows/dwmapi.odin

@@ -3,7 +3,48 @@ package sys_windows
 
 foreign import dwmapi "system:Dwmapi.lib"
 
+MARGINS :: distinct [4]int
+PMARGINS :: ^MARGINS
+
+DWMWINDOWATTRIBUTE :: enum {
+	DWMWA_NCRENDERING_ENABLED,
+	DWMWA_NCRENDERING_POLICY,
+	DWMWA_TRANSITIONS_FORCEDISABLED,
+	DWMWA_ALLOW_NCPAINT,
+	DWMWA_CAPTION_BUTTON_BOUNDS,
+	DWMWA_NONCLIENT_RTL_LAYOUT,
+	DWMWA_FORCE_ICONIC_REPRESENTATION,
+	DWMWA_FLIP3D_POLICY,
+	DWMWA_EXTENDED_FRAME_BOUNDS,
+	DWMWA_HAS_ICONIC_BITMAP,
+	DWMWA_DISALLOW_PEEK,
+	DWMWA_EXCLUDED_FROM_PEEK,
+	DWMWA_CLOAK,
+	DWMWA_CLOAKED,
+	DWMWA_FREEZE_REPRESENTATION,
+	DWMWA_PASSIVE_UPDATE_MODE,
+	DWMWA_USE_HOSTBACKDROPBRUSH,
+	DWMWA_USE_IMMERSIVE_DARK_MODE = 20,
+	DWMWA_WINDOW_CORNER_PREFERENCE = 33,
+	DWMWA_BORDER_COLOR,
+	DWMWA_CAPTION_COLOR,
+	DWMWA_TEXT_COLOR,
+	DWMWA_VISIBLE_FRAME_BORDER_THICKNESS,
+	DWMWA_SYSTEMBACKDROP_TYPE,
+  	DWMWA_LAST,
+}
+
+DWMNCRENDERINGPOLICY :: enum {
+	DWMNCRP_USEWINDOWSTYLE,
+	DWMNCRP_DISABLED,
+	DWMNCRP_ENABLED,
+	DWMNCRP_LAST,
+};
+
 @(default_calling_convention="stdcall")
 foreign dwmapi {
 	DwmFlush :: proc() -> HRESULT ---
+	DwmIsCompositionEnabled :: proc(pfEnabled: ^BOOL) -> HRESULT ---
+	DwmExtendFrameIntoClientArea :: proc(hWnd: HWND, pMarInset: PMARGINS) -> HRESULT ---
+	DwmSetWindowAttribute :: proc(hWnd: HWND, dwAttribute: DWORD, pvAttribute: LPCVOID, cbAttribute: DWORD) -> HRESULT ---
 }