Device Context Creation

[Guest_imported]

Hi

I need to create a device context called pGridDC which is 400 by 500 pixels big. I want to create this device context out of the OnDraw function. Therefore I cannot use pDC from the OnDraw function. The purpose of pGridDC is so I can BitBlt bitmaps in other DC's to it.

Can anyone please help?

Thank you

 

[Sun]

Hi,

What you can do is you can do a CreateCompatibleDC().
if you want to do it outside OnDraw() what you can do is you can go a
CDC* pDC = GetDC();

CDC dcMemory;
dcMemory.CreateCompatibleDC(pDC);
dcMemory.BitBlt(0,0,400,500,pointer to the device context from where you want to draw on the memory DC, 0, 0, SRCCPY);

more code to release the DC's

and finally pDC->ReleaseDC();

Hope this helps.

Thanx and Regards
Sun