This function retrieves information about a screen.
TRUE indicates success. FALSE indicates failure. To get extended error information, call GetLastError.
This function can retrieve information about a screen in either a MONITORINFO or MONITORINFOEX structure. MONITORINFOEX, a superset of MONITORINFO, has one additional member: a string that contains a name for the screen. Most applications do not need to use a screen name and can use fewer bytes by using MONITORINFO.
You must set the cbSize member of either structure to the value that you obtain by calling the sizeof operator for MONITORINFO or MONITORINFOEX before you call GetMonitorInfo. Setting cbSize allows GetMonitorInfo to determine the type of structure you are passing to it.