@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: Determine if a specified file is a catalog file !!!!C# Signature: [DllImport("wintrust.dll")] static extern bool IsCatalogFile( SafeFileHandle hFile, [MarshalAs(UnmanagedType.LPWStr)] String pwszFileName ); !!!!VB Signature: Declare Function IsCatalogFile Lib "wintrust.dll" (TODO) As TODO !!!!User-Defined Types: None. !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: None. !!!!Tips & Tricks: For .NET versions prior to 2.0, replace SafeFileHandle with IntPtr !!!!Sample Code: using Microsoft.Win32.SafeHandles; // Sample to check if a file is a catalog by file name SafeFileHandle invalidHandle = new SafeFileHandle(new IntPtr(-1), true); if (IsCatalogFile(invalidHandle, "c:\\my_catalog.cat")) { MessageBox.Show("This file is a catalog"); } else { MessageBox.Show("This file is NOT a catalog"); } // Sample to check if a file is a catalog by file handle using (FileStream fs = new FileStream("c:\\my_catalog.cat", FileMode.Open)) { if (IsCatalogFile(fs.SafeFileHandle, null)) { MessageBox.Show("This file is a catalog"); } else { MessageBox.Show("This file is not a catalog"); } } Documentation: IsCatalogFile@msdn on MSDN
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