pl 

OnCreateSectionClass (TCustomHeaderControl)

pl 

OnSectionClick (TCustomHeaderControl)

pl 

OnSectionDrag (TCustomHeaderControl)

pl 

OnSectionEndDrag (TCustomHeaderControl)

pl 

OnSectionResize (TCustomHeaderControl)

pl 

OnSectionSeparatorDblClick (TCustomHeaderControl)

pl 

OnSectionTrack (TCustomHeaderControl)