C# Signature:

[DllImport("shlwapi.dll", CharSet = CharSet.Unicode, ExactSpelling = true, PreserveSig = false, EntryPoint = "SHCreateStreamOnFileEx")]

static extern void SHCreateStreamOnFileEx(string fileName, uint grfmode, uint dwAttributes, bool fCreate, System.Runtime.InteropServices.ComTypes.IStream streamNull, ref System.Runtime.InteropServices.ComTypes.IStream stream);

Another C# Signature:

[DllImport("shlwapi.dll", CharSet=CharSet.Unicode, PreserveSig=false)]

static extern IStream SHCreateStreamOnFileEx(string pszFile, uint grfMode, uint dwAttributes, bool fCreate, IStream pstmTemplate);

[DllImport( "shlwapi.dll", CharSet=CharSet.Unicode, ExactSpelling=true, PreserveSig=false, EntryPoint="SHCreateStreamOnFileW" )]
static extern void SHCreateStreamOnFile( string fileName, StgmConstants mode, ref System.Runtime.InteropServices.ComTypes.IStream stream );

VB Signature:

Declare Function SHCreateStreamOnFileEx Lib "shlwapi.dll" (TODO) As TODO

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

I have only tested this using .NET 2.0. Also note that the above import will cause the API to throw a managed exception in case of failure as opposed to returning a HRESULT error code.

See StgmConstants for the flags corresponding to the mode parameter.

Tips & Tricks:

Please add some!

Sample Code:

Please add some!

private System.Runtime.InteropServices.ComTypes.IStream GetComStreamForFile( string fileName )

{

  System.Runtime.InteropServices.ComTypes.IStream stream = null;

  SHCreateStreamOnFile( fileName, StgmConstants.STGM_SHARE_DENY_WRITE, ref stream );
  return stream;

}

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