Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.


The framework calls this member function whenever Windows needs to know the maximized position or dimensions, or the minimum or maximum tracking size.

afx_msg void OnGetMinMaxInfo( 


Points to a MINMAXINFO structure that contains information about a window's maximized size and position and its minimum and maximum tracking size. For more about this structure, see the MINMAXINFO structure.

The maximized size is the size of the window when its borders are fully extended. The maximum tracking size of the window is the largest window size that can be achieved by using the borders to size the window. The minimum tracking size of the window is the smallest window size that can be achieved by using the borders to size the window.

Windows fills in an array of points specifying default values for the various positions and dimensions. The application may change these values in OnGetMinMaxInfo.


This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.

Header: afxwin.h

Community Additions

© 2015 Microsoft