Textctrl / Combobox focus

Hi,

I have various frames (miniframes with panel's attached) used for data entry by
the user.

These frames have editable comboboxes and textctrl's.

I want to be able to have the first control on the page with a blinking cursor
ready for the user to type something without them having to click to activate
the control.

I thought it would be a case of just calling SetFocus() on the control but this
doesn't work.

Can anyone enlighten me?

Thanks,
Steve.