Applications cannot call this protected method. Data-aware grids call CancelLayout internally when postponing the recomputation of Columns.  

Each call to BeginLayout increments the LayoutLock property. Each call to EndLayout or CancelLayout decrements the LayoutLock property. If LayoutLock returns to 0 in a call to CancelLayout, the Columns property is not updated. CancelLayout is called from the DeferLayout method to decrement the LayoutLock and prevent the recomputation of Columns until a more appropriate time. 

BeginLayout 

Columns 

DeferLayout 

EndLayout 

LayoutLock