How to use GET_X_LPARAM in D ?

[Harry Gillanders]

On Thursday, 21 May 2020 at 18:42:47 UTC, Vinod K Chandran wrote:
> Hi all,
> I need to use the macro GET_X_LPARAM. But compiler says that 
> "undefined identifier GET_X_LPARAM". I cant find any modules 
> with GET_X_LPARAM defined. Do i miss something ?

GET_X_LPARAM isn't defined in Phobos's Windows bindings, so 
you'll need to
provide the definition yourself.

GET_X_LPARAM is defined as a macro in the windowsx.h header of 
the Windows SDK, as:
	#define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))

Which can trivially be translated to D as a function, like so:

	int GET_X_LPARAM (T) (T lp)
	{
		import core.sys.windows.windef : LOWORD;

		return cast(int) cast(short) LOWORD(lp);
	}

Hope this helps :)