www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.learn - How to use GET_X_LPARAM in D ?

reply Vinod K Chandran <kcvinu82 gmail.com> writes:
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 2020
next sibling parent Vinod K Chandran <kcvinu82 gmail.com> writes:
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 2020
prev sibling parent reply Harry Gillanders <ac3e584b harrygillanders.com> writes:
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 2020
parent Vinod K Chandran <kcvinu82 gmail.com> writes:
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. :)
May 21 2020