MessageFrame:SetMinResize(minWidth, minHeight)

Sets the minimum size of the frame for user resizing. Applies when resizing the frame with the mouse via :StartSizing().


Signature:

Arguments:

• minWidth - Minimum width of the frame (in pixels), or 0 for no limit (number)
  
• minHeight - Minimum height of the frame (in pixels), or 0 for no limit (number)