Thread overview
How to use GET_X_LPARAM in D ?
May 21
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 ?
May 21
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 ?

I search all modules in " C:\D\dmd2\src\druntime\src\core\sys\windows ". But no luck.

May 21
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 :)


May 21
On Thursday, 21 May 2020 at 20:12:13 UTC, Harry Gillanders wrote:
> 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 :)

Thank you for the code and guidance. Let me check it. :)