DllCall and EnumDisplayMonitors (call back functions)

[JavaCupiX]

Hi,

I'm struggling to use the "EnumDisplayMonitors" function available in the "user32.dll" (http://msdn.microsoft.com/en-us/library/ms534809(VS.85).aspx), the problem is related to the use of callback functions, I just don't get how all of this can be used in autoit.

I've started with that but can't get more further... any idea?

$handle = DLLCallbackRegister ("_MonitorEnumProc", "long", "long;long;long;str")

;~ ; Call EnumDisplayMonitors

DllCall("user32.dll", "bool", "EnumDisplayMonitors", "long", 0, "long", 0, "ptr", DllCallbackGetPtr($handle), "lparam", 10)

;~ ; Delete callback function

DllCallbackFree($handle)

[monoceres]

Hi!

You have got some errors, here's how you should do it

$callback=DllCallbackRegister("MonitorEnumProc","int","ptr;ptr;ptr;lparam")

DllCall("user32.dll","int","EnumDisplayMonitors","ptr",0,"ptr",0,"ptr",DllCallbackGetPtr($callback),"lparam",10)


Func MonitorEnumProc($hMonitor,$hdcMonitor,$lprect,$lparam)
    
    MsgBox(0,"Monitor","Monitor handle: "&$hMonitor&@CRLF&"LPARAM: "&$lparam)
    
EndFunc

Edited October 9, 2008 by monoceres

[JavaCupiX]

  monoceres said:

Hi!

You have got some errors, here's how you should do it

$callback=DllCallbackRegister("MonitorEnumProc","int","ptr;ptr;ptr;lparam")

DllCall("user32.dll","int","EnumDisplayMonitors","ptr",0,"ptr",0,"ptr",DllCallbackGetPtr($callback),"lparam",10)


Func MonitorEnumProc($hMonitor,$hdcMonitor,$lprect,$lparam)
    
    MsgBox(0,"Monitor","Monitor handle: "&$hMonitor&@CRLF&"LPARAM: "&$lparam)
    
EndFunc

Thanks a lot!