C# Signature:
[DllImport("shlwapi.dll")]
extern static int AssocCreate(
ref Guid clsid,
ref Guid riid,
[MarshalAs(UnmanagedType.Interface)] out object ppv);
VB Signature:
Declare Function AssocCreate Lib "shlwapi.dll" (TODO) As TODO
User-Defined Types:
[Flags]
enum ASSOCF
{
INIT_NOREMAPCLSID = 0x00000001,
INIT_BYEXENAME = 0x00000002,
OPEN_BYEXENAME = 0x00000002,
INIT_DEFAULTTOSTAR = 0x00000004,
INIT_DEFAULTTOFOLDER = 0x00000008,
NOUSERSETTINGS = 0x00000010,
NOTRUNCATE = 0x00000020,
VERIFY = 0x00000040,
REMAPRUNDLL = 0x00000080,
NOFIXUPS = 0x00000100,
IGNOREBASECLASS = 0x00000200,
INIT_IGNOREUNKNOWN = 0x00000400
}
enum ASSOCSTR
{
COMMAND = 1,
EXECUTABLE,
FRIENDLYDOCNAME,
FRIENDLYAPPNAME,
NOOPEN,
SHELLNEWVALUE,
DDECOMMAND,
DDEIFEXEC,
DDEAPPLICATION,
DDETOPIC,
INFOTIP,
QUICKTIP,
TILEINFO,
CONTENTTYPE,
DEFAULTICON,
SHELLEXTENSION
}
enum ASSOCKEY
{
SHELLEXECCLASS = 1,
APP,
CLASS,
BASECLASS
}
enum ASSOCDATA
{
MSIDESCRIPTOR = 1,
NOACTIVATEHANDLER,
QUERYCLASSSTORE,
HASPERUSERASSOC,
EDITFLAGS,
VALUE
}
[Guid("c46ca590-3c3f-11d2-bee6-0000f805ca57"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IQueryAssociations
{
void Init(
[In] ASSOCF flags,
[In, MarshalAs(UnmanagedType.LPWStr)] string pszAssoc,
[In] UIntPtr hkProgid,
[In] IntPtr hwnd);
void GetString(
[In] ASSOCF flags,
[In] ASSOCSTR str,
[In, MarshalAs(UnmanagedType.LPWStr)] string pwszExtra,
[Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pwszOut,
[In, Out] ref int pcchOut);
void GetKey(
[In] ASSOCF flags,
[In] ASSOCKEY str,
[In, MarshalAs(UnmanagedType.LPWStr)] string pwszExtra,
[Out] out UIntPtr phkeyOut);
void GetData(
[In] ASSOCF flags,
[In] ASSOCDATA data,
[In, MarshalAs(UnmanagedType.LPWStr)] string pwszExtra,
[Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 4)] out byte[] pvOut,
[In, Out] ref int pcbOut);
void GetEnum(); // not used actually
}
static Guid CLSID_QueryAssociations = new Guid("a07034fd-6caa-4954-ac3f-97a27216f98a");
static Guid IID_IQueryAssociations = new Guid("c46ca590-3c3f-11d2-bee6-0000f805ca57");
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
try
{
object obj;
AssocCreate(
ref CLSID_QueryAssociations,
ref IID_IQueryAssociations,
out obj);
IQueryAssociations qa = (IQueryAssociations)obj;
qa.Init(
ASSOCF.INIT_DEFAULTTOSTAR,
".doc",
UIntPtr.Zero, IntPtr.Zero);
int size = 0;
qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND,
"print", null, ref size);
StringBuilder sb = new StringBuilder(size);
qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND,
"print", sb, ref size);
Console.WriteLine(".doc is printed by : {0}", sb.ToString());
}
catch(Exception e)
{
if((uint)Marshal.GetHRForException(e) == 0x80070483)
Console.WriteLine("No command line is associated to .doc print verb.");
else
throw;
}
