P/Invoke to Shell32 SHFileOperation

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Brian Reed - 26 Jul 2004 10:01 GMT

SHI am trying to use the Shell32 operation FileOperation to send a file to the recycling Bin. I have defined the structure in my class as follows and am hoping my definition is correct. Please let me know if I have it correct:

[StructLayout(LayoutKind.Sequential)]
internal struct _SHFILEOPSTRUCT
{
public IntPtr hwnd;
public Int32 wFunc;
[MarshalAs(UnmanagedType.LPStr)]
public String pFrom;
[MarshalAs(UnmanagedType.LPStr)]
public String pTo;
public Int32 fFlags;
public Int32 fAnyOperationsAborted;
public IntPtr hNameMappings;
[MarshalAs(UnmanagedType.LPStr)]
public String lpszProgressTitle;
}

internal enum FileOpFunc
{
Delete = 3
}

internal enum FileOpFlags
{
Silent=0x04,
AllowUndo=0x40,
NoConfirmation=0x10
}

[DllImport("Shell32.dll")]
internal static extern Int32 SHFileOperation(ref _SHFILEOPSTRUCT fileOp);

Sometimes when I call it I get a failure response of 1026 (0x402). Sometimes it works. Does anyone know what this response value is?

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BMermuys - 26 Jul 2004 12:19 GMT

Hi,
inline,

> SHI am trying to use the Shell32 operation FileOperation to send a file to the recycling Bin. I have defined the structure in my class as follows and

am hoping my definition is correct. Please let me know if I have it
correct:

> [StructLayout(LayoutKind.Sequential)]
> internal struct _SHFILEOPSTRUCT
[quoted text clipped - 26 lines]
> [DllImport("Shell32.dll")]
> internal static extern Int32 SHFileOperation(ref _SHFILEOPSTRUCT fileOp);

How do you call it? Some struct fields must be 'double null terminated', eg.

aFileOpStruct.pFrom = "test.txt\0test2.txt\0";
aFileOpStruct.pFrom = "test.txt\0";

C# will add the second null to the end when marshalling.

HTH,
greetings

> Sometimes when I call it I get a failure response of 1026 (0x402). Sometimes it works. Does anyone know what this response value is?

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P/Invoke to Shell32 SHFileOperation

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