struct SHFILEOPSTRUCT

Public Structure SHFILEOPSTRUCT

Public Type SHFILEOPSTRUCT

Under x64, the SHFILEOPSTRUCT must be declared without the Pack = 1 parameter, or it will fail. This is a real pain if you want your code to be platform independent, as you have to declare two separate structures, one with Pack = 1, and one without. You then have to declare two different SHFileOperation calls, one for each of the structures. Then you have to decide which one to call depending on whether you are running on 32 or 64 bit.

Don't declare a value for the Pack size. If you omit it, the correct value is used when marshaling and a single SHFILEOPSTRUCT can be used for both 32-bit and 64-bit operation.

    public const int FOF_WANTMAPPINGHANDLE      = 0x0020;  // Fill in SHFILEOPSTRUCT.hNameMappings

    public const int FOF_WANTMAPPINGHANDLE      = 0x0020;  // Fill in SHFILEOPSTRUCT.hNameMappings

SHFILEOPSTRUCT

    /// Fill in SHFILEOPSTRUCT.hNameMappings.

    ''' Fill in SHFILEOPSTRUCT.hNameMappings.

SHFILEOPSTRUCT

static extern int SHFileOperation([In] ref SHFILEOPSTRUCT lpFileOp);

Public Function SHFileOperation(<MarshalAs(UnmanagedType.Struct)>ByRef lpFileOp As SHFILEOPSTRUCT) As Integer

        (lpFileOp As SHFILEOPSTRUCT) As Long

SHFILEOPSTRUCT

• The SHFILEOPSTRUCT StructLayout attribute needs a Pack=2 (win32 - see this in the example) and Pack=8 (win64) parameter. Without it, it does not work. Of course both cannot be set for the same struct, so 2 structs are needed.

    struct SHFILEOPSTRUCT

    static extern int SHFileOperation([In, Out] ref SHFILEOPSTRUCT lpFileOp);

    private SHFILEOPSTRUCT _ShFile;

        this._ShFile = new SHFILEOPSTRUCT();

            FOF_WANTMAPPINGHANDLE = 0x0020,  // Fill in SHFILEOPSTRUCT.hNameMappings