AutoRedraw property
Available for Window and DialogBox objects.
Read/Write only at design time
Specifies whether the entire window is redrawn when a movement or size adjustment changes the width or the height of the window. It can be one of the following values:
TRUE The entire window
is redrawn.
FALSE The window is not redrawn (default).
REMARKS: Setting this property to TRUE adds the CS_HREDRAW and CS_VREDRAW styles to the window class, while setting it to FALSE removes them.