Tip : Updating Toolbar buttons on Modal Dialog

[Cyril ZEKSER]

If you want to have the ON_UPDATE_CMD_UI called, just do the two following things :


1. Derive you toolbar from CToolBar, to add the hanfdler for WM_IDLEUPDATECMDUI (as shown in MFC code for CFrameWnd) but, before calling the parent's function, cast the this pointer to CFrameWnd*,


2. Override the CDialog::ContinueModal() that way...


BOOL CMyDialog::ContinueModal()

{

m_wndMyToolBar.SendMessage(WM_IDLEUPDATECMDUI, (WPARAM)TRUE, 0);


return CDialog::ContinueModal();

}


It is valid since the RunModalLoop (in wincore.cpp) call ContinueModal at the end of each task. (sound like EnterIdle no? )


Then your handlers of ON_UPDATE_CMD_UI of your dialog toolbar buttons are called....


that's all...