Key Return is detected in a secondary form

[Cristian]

I have a primary form with a MSHierarchical Flexgrid control. when a press the enter key over the MSHierarchical Flexgrid control a secondary form is open.
The problem is that the enter key is detected by the secondary form and change the focus from the active control.
My question is how can i delete the keyboard buffer for the secondary form will not get the enter key ?