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Sets the scroll rate for a month calendar control.

int SetMonthDelta(
   int iDelta 



The number of months to be set as the control's scroll rate. If this value is zero, the month delta is reset to the default, which is the number of months displayed in the control.

The previous scroll rate. If the scroll rate has not been previously set, the return value is 0.

This member function implements the behavior of the Win32 message MCM_SETMONTHDELTA, as described in the Platform SDK.