/// <summary>
/// Return with Explorer registered application by file's extension (for editing)
/// </summary>
/// <param name="extension"></param>
/// <param name="verb"></param>
/// <returns></returns>
/// <see cref="http://windevblog.blogspot.com/2008/09/get-default-application-in-windows-xp.html"/>
/// <see cref="http://msdn.microsoft.com/en-us/library/cc144154%28VS.85%29.aspx"/>
private string GetExplorerRegisteredApplication(string extension, string verb)
{
try
{
object obj;
AssocCreate(CLSID_QueryAssociations, ref IID_IQueryAssociations, out obj);
IQueryAssociations qa = (IQueryAssociations)obj;
qa.Init(ASSOCF.INIT_DEFAULTTOSTAR, extension, UIntPtr.Zero, IntPtr.Zero);
int size = 0;
qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND, verb, null, ref size);
StringBuilder sb = new StringBuilder(size);
qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND, verb, sb, ref size);
string cmd = sb.ToString();
if (Utils.IsBlank(cmd))
{
return(null);
}
if (cmd.Contains("\""))
{
return(cmd.Substring(1, cmd.IndexOf("\"", 1) - 1));
}
return(cmd.Substring(0, cmd.IndexOf(" ")));
}
catch (Exception e)
{
return(null);
}
}
private string GetString(ASSOCSTR astr)
{
const ASSOCF flags = ASSOCF.ASSOCF_NOTRUNCATE | ASSOCF.ASSOCF_REMAPRUNDLL;
var sz = 0U;
qassoc.GetString(flags, astr, null, null, ref sz);
var sb = new StringBuilder((int)sz, (int)sz);
qassoc.GetString(flags, astr, null, sb, ref sz);
return(sb.ToString());
}