Retrieving Windows system error message

The WIN API FormatMessage function (among other things) can retrieve message definition from an already-loaded module or the system's message table. The error code usually is provided by the GetLastError

WIN API function.

Move Form without Titlebar

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The code below shows how a form without titlebar can be moved with a mouse. It uses ReleaseCapture and SendMessage Windows API functions and based on How to Move a Form that Has No Titlebar or Caption.

Determine Printer Margins Programmatically

The GetDeviceCaps function can be used to retrieve printer-specific information as demonstrated below.

Detect Multiple Monitors

The GetSystemMetrics WIN API can be used to get the number of monitors. Some other constants related to multi-monitor PC configurations are also included.

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