private long MAKELONG( int low, int high ) {
			return (low & 0xffff) | ((high & 0xffff) << 16);
		}
Same implementation as MAKELONG(wLow, wHigh) macro in windef.h.
flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java