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Using TaskDialogIndirect in C #

I've been working with a regular Windows Vista / 7 TaskDialog for a while, and I wanted to add some additional functionality (like custom buttons and footer), so I need to use TaskDialogIndirect .

Following the MSDN documentation for TaskDialogIndirect I got this signature:

[DllImport("comctl32.dll",CharSet = CharSet.Unicode,EntryPoint="TaskDialogIndirect")]
static extern int TaskDialogIndirect (TASKDIALOGCONFIG pTaskConfig, out int pnButton, out int pnRadioButton, out bool pfVerificationFlagChecked);

Below is the TASKDIALOGCONFIG class :

public class TASKDIALOGCONFIG
{
    public UInt16 cbSize;
    public IntPtr hwndParent;
    public IntPtr hInstance;
    public String dwFlags;
    public String dwCommonButtons;
    public IntPtr hMainIcon;
    public String pszMainIcon;
    public String pszMainInstruction;
    public String pszContent;
    public UInt16 cButtons;
    public TASKDIALOG_BUTTON pButtons;
    public int nDefaultButton;
    public UInt16 cRadioButtons;
    public TASKDIALOG_BUTTON pRadioButtons;
    public int nDefaultRadioButton;
    public String pszVerificationText;
    public String pszExpandedInformation;
    public String pszExpandedControlText;
    public String pszCollapsedControlText;
    public IntPtr hFooterIcon;
    public IntPtr pszFooterText;
    public String pszFooter;
    // pfCallback;
    // lpCallbackData;
    public UInt16 cxWidth;
}

Implementation of TASKDIALOG_BUTTON:

public class TASKDIALOG_BUTTON
{
    public int nButtonID;
    public String pszButtonText;
}

I'm not entirely sure if I'm correct here. Has anyone used TaskDialogIndirect from managed code directly through WinAPI (no VistaBridge or Windows Code Code Pack)? I am curious about possible implementations as well as callback declarations (I'm not really sure how to implement TaskDialogCallbackProc ).

PS: I'm looking for a direct WinAPI implementation, not a single wrapper.

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4 answers


The Windows API source code is worth looking at as it contains a fairly complete implementation of TaskDialogIndirect using WinAPI - including callbacks - that would be a good starting point for your own implementation.



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Take a look at the VistaBridge library. This will give you a nice wrapper around the whole thing, including TaskDialogIndirect ..



http://code.msdn.microsoft.com/VistaBridge

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PInvoke.NET is a great resource for PInvoke technologies. Unfortunately, they only have a TODO stub for the TaskDialogIndirect .

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Take a look at http://www.codeproject.com/Articles/21276/Vista-TaskDialog-Wrapper-and-Emulator . Specifically, the VistaUnsafeNativeMethods.cs file has the appropriate bits DllImport

including VistaTaskDialogCallback

, which I think is the callback you are interested in.

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