private DWORD RGB( int r, int g, int b ) {
			return new DWORD( (r & 0xff) | ((g & 0xff) << 8) | ((b & 0xff) << 16) );
		}
Same implementation as RGB(r,g,b) macro in wingdi.h.
flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java