What is the equivalence of LPCTSTR * in C #

Question

I have an unmanaged C ++ function inside a Dll that I call from my C # application. Here is the function signature:

GetCrashMeasurement(LPCTSTR channelName, LPCTSTR properties, LPCTSTR * Values, HANDLE error)

where channelNameand propertiesis the input parameter [in]; and Values- output parameter [out].

I also use the invoke platform from my C # application as follows:

[DllImport("DrvCrashHAL.dll", EntryPoint = "coCRAL_GetCrashMeasurements")]

public static unsafe extern CoStatus GetCrashMeasurements(string sChannel, string sMeasurements, ref string sValues, IntPtr hError);

From my C # application, I call the function as follows:

string Text = "";
intptr herror = intptr.zero;
GetCrashMeasurements("channelname","",ref Text,herror);

But then my program stops exactly on this line, without throwing any exception, and all I see in the output window is the following message:

Critical error detected c0000374
Critical error detected c0000374
The program '[4964] ProjectX.exe: Managed' has exited with code 0 (0x0).
The program '[4964] ProjectX.exe: Native' has exited with code 0 (0x0).

My guess is that the problem is with the sort type LPCTSTR.

Can someone tell me what I'm doing wrong or point me in the right direction?

Thanks in advance.

Answer 1

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Answer 2

@jester LPCTSTR* Values, . ?

public static unsafe extern CoStatus GetCrashMeasurements(string sChannel, string sMeasurements, string[] sValues, IntPtr hError);

GetCrashMeasurements("channelname","",new[] { Text },herror);

MarshalAs sValues.

public static unsafe extern CoStatus GetCrashMeasurements(string sChannel,
                                                          string sMeasurements,
                                                          [MarshalAs(UnmanagedType.LPArray, ArraySubType=UnmanagedType.LPTStr)]
                                                          string[] sValues,
                                                          IntPtr hError);