>>It may be a silly question, but I badly need a solution!
Well surely it is not a silly question.I have gone through the same stage.
For enabling/disabling Toolbar Buttons at Runtime use SendMessage() like this:
FOR ENABLING BUTTON:
GetToolBarCtrl().SendMessage(TB_ENABLEBUTTON,<ButtonID>, (LPARAM)MAKELONG(TRUE,0));
FOR DISABLING BUTTON:
GetToolBarCtrl().SendMessage(TB_ENABLEBUTTON,<ButtonID>, (LPARAM)MAKELONG(FALSE,0));
I hope this helps!
mathu