Hallo,
Zitat von
msdn:
To change the work area of a monitor, call SystemParametersInfo with SPI_SETWORKAREA and pvParam pointing to a RECT structure that is on the desired monitor. If pvParam is NULL, the work area of the primary monitor is modified. Using SPI_GETWORKAREA always returns the work area of the primary monitor. To get the work area of a monitor other than the primary monitor, call GetMonitorInfo.