core: Bind CreateEvent and SetEvent for win32.

Author: bhelyer

rt/src/core/c/windows/windows.volt

@@ -810,8 +810,13 @@ fn RegEnumKeyExW(HKEY, DWORD, LPCWSTR, LPDWORD, LPDWORD, LPWSTR, LPDWORD, PFILET
 fn RegQueryInfoKeyA(HKEY, LPCSTR, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, PFILETIME) LONG;
 fn RegQueryInfoKeyW(HKEY, LPCWSTR, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, LPDWORD, PFILETIME) LONG;
 
+fn CreateEventA(LPSECURITY_ATTRIBUTES, BOOL, BOOL, LPCSTR) HANDLE;
+fn CreateEventW(LPSECURITY_ATTRIBUTES, BOOL, BOOL, LPCWSTR) HANDLE;
+fn SetEvent(HANDLE) BOOL;
+
 // Helper functions needs to be marked with extern volt so
 // they do not collide with other C function with similar names.
+// DO NOT ADD ANY WINDOWS FUNCTIONS AFTER THIS!
 extern(Volt):
 
 fn LOWORD(dw: DWORD) WORD
@@ -838,5 +843,4 @@ fn GET_XBUTTON_WPARAM(w: WPARAM) i32
 {
 	return cast(i32)cast(i16)HIWORD(cast(DWORD)w);
 }
-
 // DO NOT ADD ANY WINDOWS FUNCTIONS AFTER THIS!