Add this to the form's Resize() event:

Thisform.cntLocked.Left  = INT((Thisform.Width 	- Thisform.cntLocked.Width) / 2
Thisform.cntLocked.Top  = INT((Thisform.Height   - Thisform.cntLocked.Height) / 2)

In the form's Init() event make a call to the thisform.Resize() code above.