Retrieves the minimum size required to display a full month in a month calendar control. You can send this message explicitly or by using the MonthCal_GetMinReqRect macro.
- Must be zero.
Pointer to a RECT structure that will receive bounding rectangle information. This parameter must be a valid address and cannot be NULL.
Returns nonzero and lParam receives the applicable bounding information if successful. Otherwise, the message returns zero.
The minimum required window size for a month calendar control depends on the currently selected font, control styles, system metrics, and regional settings. When an application changes anything that affects the minimum window size, or processes a WM_SETTINGCHANGE message, it should send MCM_GETMINREQRECT to determine the new minimum size.
The top and left members of the structure pointed to by lParam will always be zero. The right and bottom members represent the minimum cx and cy required for the control.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2003 [desktop apps only]|