sys/windows: add several functions and constants

core/sys/windows/types.odin

@@ -34,6 +34,7 @@ HBITMAP :: distinct HANDLE
 HGLOBAL :: distinct HANDLE
 HHOOK :: distinct HANDLE
 HKEY :: distinct HANDLE
+HDESK :: distinct HANDLE
 BOOL :: distinct b32
 BYTE :: distinct u8
 BOOLEAN :: distinct b8
@@ -415,6 +416,40 @@ REG_RESOURCE_REQUIREMENTS_LIST :: 10
 REG_QWORD                      :: 11
 REG_QWORD_LITTLE_ENDIAN        :: 11
 
+BSMINFO :: struct {
+	cbSize: UINT,
+	hdesk: HDESK,
+	hwnd: HWND,
+	luid: LUID,
+}
+PBSMINFO :: ^BSMINFO
+
+// Broadcast Special Message Recipient list
+BSM_ALLCOMPONENTS      :: 0x00000000
+BSM_VXDS               :: 0x00000001
+BSM_NETDRIVER          :: 0x00000002
+BSM_INSTALLABLEDRIVERS :: 0x00000004
+BSM_APPLICATIONS       :: 0x00000008
+BSM_ALLDESKTOPS        :: 0x00000010
+
+// Broadcast Special Message Flags
+BSF_QUERY              :: 0x00000001
+BSF_IGNORECURRENTTASK  :: 0x00000002
+BSF_FLUSHDISK          :: 0x00000004
+BSF_NOHANG             :: 0x00000008
+BSF_POSTMESSAGE        :: 0x00000010
+BSF_FORCEIFHUNG        :: 0x00000020
+BSF_NOTIMEOUTIFNOTHUNG :: 0x00000040
+BSF_ALLOWSFW           :: 0x00000080
+BSF_SENDNOTIFYMESSAGE  :: 0x00000100
+BSF_RETURNHDESK        :: 0x00000200
+BSF_LUID               :: 0x00000400
+
+BROADCAST_QUERY_DENY :: 0x424D5144
+
+// Special HWND value for use with PostMessage() and SendMessage()
+HWND_BROADCAST :: HWND(uintptr(0xffff))
+HWND_MESSAGE   :: HWND(~uintptr(0) - 2) // -3
 
 PTIMERAPCROUTINE :: #type proc "stdcall" (lpArgToCompletionRoutine: LPVOID, dwTimerLowValue, dwTimerHighValue: DWORD)
 

core/sys/windows/user32.odin

@@ -134,6 +134,33 @@ foreign user32 {
 	GetCursorPos :: proc(lpPoint: LPPOINT) -> BOOL ---
 	SetCursorPos :: proc(X: c_int, Y: c_int) -> BOOL ---
 	SetCursor :: proc(hCursor: HCURSOR) -> HCURSOR ---
+
+	BroadcastSystemMessageW :: proc(
+		flags: DWORD,
+		lpInfo: LPDWORD,
+		Msg: UINT,
+		wParam: WPARAM,
+		lParam: LPARAM,
+	) -> c_long ---
+
+	BroadcastSystemMessageExW :: proc(
+		flags: DWORD,
+		lpInfo: LPDWORD,
+		Msg: UINT,
+		wParam: WPARAM,
+		lParam: LPARAM,
+		pbsmInfo: PBSMINFO,
+	) -> c_long ---
+
+	SendMessageTimeoutW :: proc(
+		hWnd: HWND,
+		Msg: UINT,
+		wParam: WPARAM,
+		lParam: LPARAM,
+		fuFlags: UINT,
+		uTimeout: UINT,
+		lpdwResult: PDWORD_PTR,
+	) -> LRESULT ---
 }
 
 CreateWindowW :: #force_inline proc "stdcall" (

core/sys/windows/window_messages.odin

@@ -25,6 +25,7 @@ WM_ENDSESSION                 :: 0x0016
 WM_SHOWWINDOW                 :: 0x0018
 WM_CTLCOLOR                   :: 0x0019
 WM_WININICHANGE               :: 0x001a
+WM_SETTINGCHANGE              :: WM_WININICHANGE
 WM_DEVMODECHANGE              :: 0x001b
 WM_ACTIVATEAPP                :: 0x001c
 WM_FONTCHANGE                 :: 0x001d