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Joined: 01 Oct 2004
Posts: 2
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Hello!
I am working on .NET compact framework. I have a device driver in C/C++. I need to write a wrapper in C# for it.
So I used DllImport statements for all the methods that I want to use and are there in the dll. I am unable to write a DllImport definition for one of the functions defined in the DLL
Here is the Function prototype in dll:
DWORD WINAPI RFID_EnableTriggerCallback(HANDLE *phTrigger, HANDLE hReader, BOOL bFlag, void (*pTriggerCallbackParam)(DWORD dwTriggerStatus), DWORD dwTriggerMask);
The 4rth parameter is the function name that would be invoked when this event occurs. Basically our device has a Trigger which when pressed invokes this method (RFID_EnableTriggerCallback method) which in turn calls the user defined method pTriggerCallbackParam).
The way I thought I would do in C# was like this:
[DllImport("kernel32.dll")]
public static extern UInt32 RFID_EnableTriggerCallback(ref IntPtr phTrigger, IntPtr hReader, bool bFlag, IntPtr callBackFunctionName, bool dwTriggerMask);
But I think, the way i am specifying the 4rth parameter is wrong. Please tell me the correct way to do it.
Thanks
Madhu Tera |
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