command handling

I developing a VC++ app.
In one of my form view's OnInitialUpdate I am plotting a chart. While Plotting I have disabled some push buttons and radio buttons. I have also put the Hour glass cursor while plotting. But if I click on the disabled buttons, the same messages( ie, even at disabled states the controls are accepting user actions) are processed once after plotting.

Please help me how to tackle.

Thanks in Advance

Prasanna