[Mingw-users] WinApi functions with MinGW

[<elm...@te...>]

Hi everyone I would like to use the windows api functions with my Qt project.

I  know that I must include the windows.h file but when I try to write some api functions the compiler said that the NULL value is diferent that NULL MinGw or something like that.


On the other hand, I found a dll library (http://www.codeproject.com/win32/AntonioWinLock.asp). This dll lock windows desktop (Ctrl+Alt+Del and others),  and it work well with vc++ and vb, I need to call this dll into my Qt project. I wrote into my .pro file the next opctions:

LIBS+:=pathtothedll'\winlock.lib .

And into frmloging.h #include "winlockdll.h", then I can do that

Class FrmLogin : public QDialog
        {
           public :
           ....
           int CtrlAltDel_Enable_Disable(BOOL bEnableDisable);
            .....

}

void FrmLogin::myFunction(){
CtrlAltDel_Enable_Disable(false);

}
but when I try to Call this function I have an error. (Undefined the definition from CtrlAltDel_Enable_Disable).


What must I do.