C++ realize screen capture function

This article shares the specific code of C++ to realize the full-screen screenshot function for your reference. The specific content is as follows

Recently maintained projects, in some cases, just having a log is not enough, so added screenshots, in certain cases, automatic screenshots to aid analysis, to improve the program. Below is the screenshot implementation code.

void CDemoDlg::ScreenShot(void) 
{ 
 CWnd *pDesktop = GetDesktopWindow(); 
 CDC *pdeskdc = pDesktop->GetDC(); 
 CRect re; 
 // Gets the size of the window  
 pDesktop->GetClientRect(&re); 
 CBitmap bmp; 
 bmp.CreateCompatibleBitmap(pdeskdc, re.Width(), re.Height()); 
 // create 1 A compatible memory artboard  
 CDC memorydc; 
 memorydc.CreateCompatibleDC(pdeskdc); 
 // Select the brush  
 CBitmap *pold = memorydc.SelectObject(&bmp); 
 // The plot  
 memorydc.BitBlt(0, 0, re.Width(), re.Height(), pdeskdc, 0, 0, SRCCOPY); 
 // Gets the mouse position, and then adds the mouse image  
 CPoint po; 
 GetCursorPos(&po); 
 HICON hinco = (HICON)GetCursor(); 
 memorydc.DrawIcon(po.x - 10, po.y - 10, hinco); 
 // Select the original brush  
 memorydc.SelectObject(pold); 
 BITMAP bit; 
 bmp.GetBitmap(&bit); 
 // define   Image size (unit: byte )  
 DWORD size = bit.bmWidthBytes * bit.bmHeight; 
 LPSTR lpdata = (LPSTR)GlobalAlloc(GPTR, size); 
 // And then create 1 a bmp The required file header for a file  
 BITMAPINFOHEADER pbitinfo; 
 pbitinfo.biBitCount = 24; 
 pbitinfo.biClrImportant = 0; 
 pbitinfo.biCompression = BI_RGB; 
 pbitinfo.biHeight = bit.bmHeight; 
 pbitinfo.biPlanes = 1; 
 pbitinfo.biSize = sizeof(BITMAPINFOHEADER); 
 pbitinfo.biSizeImage = size; 
 pbitinfo.biWidth = bit.bmWidth; 
 pbitinfo.biXPelsPerMeter = 0; 
 pbitinfo.biYPelsPerMeter = 0; 
 GetDIBits(pdeskdc->m_hDC, bmp, 0, pbitinfo.biHeight, lpdata, (BITMAPINFO*) 
  &pbitinfo, DIB_RGB_COLORS); 
 BITMAPFILEHEADER bfh; 
 bfh.bfReserved1 = bfh.bfReserved2 = 0; 
 bfh.bfType = ((WORD)('M' << 8) | 'B'); 
 bfh.bfSize = size + 54; 
 bfh.bfOffBits = 54; 
 // Written to the file  
 CFile file; 
 CString strFileName(GetAppPathW().c_str()); 
 strFileName += _T("ScreenShot\\"); 
 CreateDirectory((LPCTSTR)strFileName, NULL); 
 CTime t = CTime::GetCurrentTime(); 
 CString tt = t.Format("%Y-%m-%d_%H-%M-%S"); 
 strFileName += tt; 
 strFileName += _T(".bmp"); 
 if (file.Open((LPCTSTR)strFileName, CFile::modeCreate | CFile::modeWrite)) 
 { 
  file.Write(&bfh, sizeof(BITMAPFILEHEADER)); 
  file.Write(&pbitinfo, sizeof(BITMAPINFOHEADER)); 
  file.Write(lpdata, size); 
  file.Close(); 
 } 
 GlobalFree(lpdata); 
} 

Code comments detailed, I will not say what, save as bmp lossless file, the volume will be a little big, friends can be converted to png format to save oh.