Why cant I get the resource ID?

Why can not I get the resource ID of a dialog using GetDlgCtrlID?

int CTestDlg::GetID()
{
return GetDlgCtrlID();
}

Interesting.

Try passing in NULL as the parameter. What does GetDlgCtrlID() return?

Kuphryn

Is your dialog a child window or a top-level window?

From the documentation of GetDlgCtrlID():
Although GetDlgCtrlID may return a value if hwndCtl is a handle to a top-level window, top-level windows cannot have identifiers and such a return value is never valid.

I have tired creating the dialog as a top-level window as well as a child window, but it always returns 0.

Well, how can I get the resoucre ID even it is a top-level window?

Quote:

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Originally Posted by kuphryn

Try passing in NULL as the parameter. What does GetDlgCtrlID() return?

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Since he obviously uses the 'CWnd' version, how would he supposed to pass 0? The function does not take any parameter as opposed to the API version... :rolleyes:

Quote:

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Originally Posted by PomeloWu

I have tired creating the dialog as a top-level window as well as a child window, but it always returns 0.

Well, how can I get the resoucre ID even it is a top-level window?

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Note that GetDlgCtrlID() gives you the control ID of a control - that's something else than the resource ID. AFAIK, there's no way to determine the original resource ID of a dialog once it is created. Anyway, what do you need this for? If you absolutely need to know the ID of the resource at runtime, you could do the following: Create your own CDialog-derived class and derive all your app's dialogs from that class (instead of deriving directly from CDialog). Then add a ctor similar to that of CDialog, which, besides from calling the base ctor, saves the resource ID that is passed upon creation to a member variable. You can then add a member function GetResourceID() which returns that value.