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 CreateDialogIndirect

The CreateDialogIndirect macro creates a modeless dialog box from a dialog box template in memory. The CreateDialogIndirect macro uses the CreateDialogIndirectParam function.

Syntax

    HWND CreateDialogIndirect(
        HINSTANCE       hInstance,
        LPCDLGTEMPLATE  lpTemplate,
        HWND            hWndParent,
        DLGPROC         lpDialogFunc
    );

Parameters

Return Value

If the function succeeds, the return value is the window handle to the dialog box.

If the function fails, the return value is NULL. To get extended error information, call GetLastError.

Remarks

The CreateDialogIndirect macro uses the CreateWindowEx function to create the dialog box. CreateDialogIndirect then sends a WM_INITDIALOG message to the dialog box procedure. If the template specifies the DS_SETFONT or DS_SHELLFONT style, the function also sends a WM_SETFONT message to the dialog box procedure. The function displays the dialog box if the template specifies the WS_VISIBLE style. Finally, CreateDialogIndirect returns the window handle to the dialog box.

After CreateDialogIndirect returns, you can use the ShowWindow function to display the dialog box (if it is not already visible). To destroy the dialog box, use the DestroyWindow function. To support keyboard navigation and other dialog box functionality, the message loop for the dialog box must call the IsDialogMessage function.

In a standard dialog box template, the DLGTEMPLATE structure and each of the DLGITEMTEMPLATE structures must be aligned on DWORD boundaries. The creation data array that follows a DLGITEMTEMPLATE structure must also be aligned on a DWORD boundary. All of the other variable-length arrays in the template must be aligned on WORD boundaries.

In an extended dialog box template, the [DLGTEMPLATEEX] header and each of the [DLGITEMTEMPLATEEX] control definitions must be aligned on DWORD boundaries. The creation data array, if any, that follows a [DLGITEMTEMPLATEEX] structure must also be aligned on a DWORD boundary. All of the other variable-length arrays in the template must be aligned on WORD boundaries.

All character strings in the dialog box template, such as titles for the dialog box and buttons, must be Unicode strings. To create code that works on both Microsoft Windows 95/98/Me and Windows NT/2000/XP, use the [MultiByteToWideChar] function to generate these Unicode strings.

Windows 95/98/Me:The system can support a maximum of 255 controls per dialog box template. To place more than 255 controls in a dialog box, create the controls in the WM_INITDIALOG message handler rather than placing them in the template.

Function Information


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Notebook exported on Monday, 7 July 2008, 18:56:50 PM Eastern Daylight Time