out of memory

[Resilience]

hello, I am having problems with the releaseDC function in my application.

According to microsoft:

Remarks

The application must call the ReleaseDC function for each call to the GetWindowDC function and for each call to the GetDC function that retrieves a common DC.

and in each sub I use it as follows:

public sub whatever()
 Dim hWndDesk As Long
 Dim hDCDesk As Long
  hWndDesk = GetDesktopWindow()
  hDCDesk = GetWindowDC(hWndDesk)
 
 ' do whatever in the sub
 
  'right before the sub ends i release the DC that i got at the beginning of it
 Call ReleaseDC(hWndDesk, hDCDesk)
end sub

But that doesnt seem to work, i still get a memory leak. In the sub of the app. that im having my issue in, the only thing i do using the DC is use the getpixel function. So, does that mean everytime i use the getpixel function i should use the releasedc function after it? Thanks

[Resilience]

anyone here familiar with releaseDC?

[Resilience]

any ideas what i could be doing wrong here?

[imosha]

are u test that the leak is in this part ao the code only ?
Did u tray DeleteDC ?

[sanjivani]

Hi,


Try using GetDc instead of GetwindowDc.

Dim hWndDesk As Long, hDCDesk As Long
    Dim  r As Long
 
    'Get the handle of the desktop window
    hWndDesk = GetDesktopWindow()
 
    'Get the desktop window's device context
    hDCDesk = GetDC(hWndDesk)
  
    'Release the device context
    r = ReleaseDC(hWndDesk, hDCDesk)

Thanks
Sanjivani

[Resilience]

Imosha, its not in any other part, because im not using a device context in any other procedure. Is there any way i could trap a memory leak error?

Sanjivani, The getpixel function returns a negitive value using GetDC and not GetWindowDC... I have no idea why.

Thanks guys,