Casting UtilitiesIbaseFilter

[juandiego]

I read in help files that there is a method (op_implicit) in Filter class that converts filter to IbaseFilter.

We are using C# project in VS2005.

But this method doesn't appear when i try to use it in an Utilities.Filter object that i created.

Anyway, I try with a standard casting

ibaseFilter my_ibaseFilter = (ibaseFilter)my_filter;

And returns an error because Utilities.Filter cannot convert to IbaseFilter...

Could you help me??

[IrinaM]

Hello juandiego,
this method (op_Implicit) returns the unmanaged pointer and so you can`t use it in C# code.

Filter class has the GetIUnknown property which returns the IUnknown interface pointer.
Syntax
          IntPtr GetIUnknown();

Using
          IBaseFilter bf = (IBaseFilter)Marshal.GetTypedObjectForIUnknown(fltr.GetIUnknown, typeof(IBaseFilter));
or
          Object myFilter = Marshal.GetObjectForIUnknown(fltr.GetIUnknown);
          IBaseFilter bf = myFilter as IBaseFilter;

[juandiego]

I'm going to test it


Thks

[RapidZer]

Hi there guys, I tried the op_Implicit) without the C# code on it. Pretty good since I was able to run it using the above syntax. I hope Diego was also able to solve his question since I haven't seen any reply from him since then. Rapid Prototyping