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Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
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C
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DLL
Hello
I have a problem in time to Call DLL which writed in C.
this property of Method:
short PerformCommandTCP( char *ipAddress, int tcpPortNumber, char *inXML, char *outXML )

the Last Parameter must be passing BYREF

my Code is:

[DllImport("AshraitPCI.dll")]
public static extern short PerformCommandTCP(string sIpAddress, int iTcpPortNumber, string sInXML, StringBuilder sOutXML);

after first time i get Error:

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

please, tell me what is a problem!
thanks
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You cannot pass managed strings to a C/C++ library, you must marshall the data to unmanaged arrays. See http://msdn.microsoft.com/en-us/library/aa288468(VS.71).aspx[^] for details.
 
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