C# Signature:

    [DllImport("coredll", EntryPoint = "FormatMessageW", SetLastError = true)]
    private static extern int FormatMessage(FormatMessageFlags dwFlags, IntPtr lpSource,
        int dwMessageId, int dwLanguageId, System.Text.StringBuilder lpBuffer, int nSize, IntPtr[] Arguments);

VB Signature:

Declare Function FormatMessageW Lib "coredll.dll" (TODO) As TODO

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

See http://msdn2.microsoft.com/en-us/library/ms679351.aspx for details on the FormatMessage native method.

Tips & Tricks:

Please add some!

Sample Code:

    [DllImport("coredll", EntryPoint = "FormatMessageW", SetLastError = true)]
    private static extern int FormatMessage(FormatMessageFlags dwFlags, IntPtr lpSource,
        int dwMessageId, int dwLanguageId, System.Text.StringBuilder lpBuffer, int nSize, IntPtr[] Arguments);

    [FlagsAttribute]
    public enum FormatMessageFlags : int
    {
        FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000
    }

    public static string FormatWin32Message(int win32ErrorCode)
    {
        System.Text.StringBuilder sbMsg = new System.Text.StringBuilder(1024);

        if (FormatMessage(FormatMessageFlags.FORMAT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, win32ErrorCode, 0, sbMsg, sbMsg.Capacity, null) != 0)
        return sbMsg.ToString();
        else
        return "Unrecognized Win32 error code";
    }

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).