public static bool Invalidate(
	IntPtr handle,
	bool erase
)

Parameters

handle

Type: SystemIntPtr
A handle to the window whose update region has changed.

erase

Type: SystemBoolean
Specifies whether the background within the update region is to be erased when the update region is processed. If this parameter is true, the background is erased when the BeginPaint function is called. If this parameter is false, the background remains unchanged.

Return Value

Reference