[VC++] Changing your screen resolution programmatically

Here is how to change your screen resolution programmatically. For doing this you may need the assistance of two APIs,

• EnumDisplaySettings() - for getting the current graphics mode.
• ChangeDisplaySettings() - for setting the modified graphic mode.

Below code demonstrate changing your system screen resolution to 1280X1024.

DEVMODE stGraphicsMode;
// Retrieves the information of current display device
EnumDisplaySettings ( NULL, 0, &stGraphicsMode );
// Change the screen resolution
stGraphicsMode.dmPelsWidth  = 1280; 
stGraphicsMode.dmPelsHeight = 1024;
stGraphicsMode.dmBitsPerPel = 32;
// Set the modifying items
stGraphicsMode.dmFields = DM_PELSWIDTH  DM_PELSHEIGHT  DM_BITSPERPEL;
// Change the display settings
if( DISP_CHANGE_SUCCESSFUL == ChangeDisplaySettings( &stGraphicsMode, CDS_FULLSCREEN ))
{
    //Successfully changed!
}