VC obtains and modifies the computer screen resolution, and vc obtains the screen resolution.

VC obtains and modifies the computer screen resolution, and vc obtains the screen resolution.

// Get resolution

  IntM_nWindwMetricsX = : GetSystemMetrics (SM_CXSCREEN ); 
  IntM_nWindwMetricsY = : GetSystemMetrics (SM_CYSCREEN ); 

// Modify resolution

DEVMODE lpDevMode;
LpDevMode. dmBitsPerPel = 32;
LpDevMode. dmPelsWidth = 1024;
LpDevMode. dmPelsHeight = 768;
LpDevMode. dmSize = sizeof (lpDevMode );
LpDevMode. dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;
LONG result;
Result = ChangeDisplaySettings (& lpDevMode, 0 );
If (result = DISP_CHANGE_SUCCESSFUL)
{
  AfxMessageBox (L "modified successfully! ");
   ChangeDisplaySettings (& lpDevMode, CDS_UPDATEREGISTRY );
//       // Use CDS_UPDATEREGISTRY to indicate that the next modification is persistent,
//       // And related data is written into the registry
}
Else
{
  AfxMessageBox (L "modification failed. restore the original settings! ");
  ChangeDisplaySettings (NULL, 0 );
}

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