C / C++ / MFC

CDRAIN wrote:

I need to save my app's screenshot...

CImage m_Image;
m_Image.Attach(hbitmap);
m_Image.Save(filename,file type but if you dont set this parameter I think it makes a bitmap);
//but you can save your file with png,jpg,...
m_Image.Detach();

HDC m_hdcMem,hdc;
HBITMAP m_Bitmap,m_OldBitmap,hMainBmp ;
//one intersting for you if you want to use of other resulition
you can simply change 800x600(640x480/1024x768,...)
int x=800;
int y=600;

//use of GetDC()->m_hDC and see result.
//hdc=GetDC()->m_hDC;
hdc=GetDesktopWindow()->GetDC()->m_hDC;

m_hdcMem= CreateCompatibleDC(hdc);

//one interesting for you if you want to use of other 	
m_Bitmap = CreateCompatibleBitmap(hdc,x,y);
 m_OldBitmap=(HBITMAP) SelectObject(m_hdcMem, m_Bitmap);

  BitBlt(m_hdcMem, 0,0,x,y, hdc,0,0,SRCCOPY);
 hMainBmp =(HBITMAP) SelectObject(m_hdcMem, m_OldBitmap);
///////////Now you have a hbitmap of screen hMainBmp/////

CImage m_Image;
m_Image.Attach(hMainBmp);
m_Image.Save("c:\\test.bmp");//use of jpg instead bmp but if you can zip your file its good.
m_Image.Detach();
DeleteDC(m_hdcMem);
DeleteObject(hMainBmp );
DeleteObject(m_OldBitmap);

IlanTal wrote:

Is there a way to do such a thing?

IlanTal wrote:

However I don't know what it means to give focus to a totally different process.

DjinnKahn wrote:

Use ::FindWindow()...