Take the 2-minute tour ×  I have WPF application. After testing
my app on Windows7 and realized that opening help does not work.
Basically to open chm help file I call:   And nothing happens. I
have also tried my app on Vista SP1, same result. I'm admin in
both OS'es  I have googled this problem, but have not found
solution to it.  Is there way to solve this problem?  Have you
experienced this types of incompatibilities.  Thank You!
share|improve this question add comment  3 Answers  up vote 3
down vote accepted  have you tried ShellExecute ?  using
System.Runtime.InteropServices;  [DllImport("shell32.dll",
CharSet = CharSet.Auto)] static extern bool ShellExecuteEx(ref
SHELLEXECUTEINFO lpExecInfo);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public int cbSize;     public uint fMask;     public IntPtr
hwnd;     public string lpVerb;     public string lpFile;
public string lpParameters;     public string lpDirectory;
public int nShow;     public IntPtr hInstApp;     public IntPt