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roby

DLL C++ TO DLLCALL - I need help please

5 posts in this topic

Hi,

I have a little problem, big for me...

I write a dll for serial comunication. The function below, receive the characters from rsr232 and function, but the value don't pass to dllCall().. WHY???

Where do I mistake??

extern "C" __declspec(dllexport) char GetByte()

{

char rxchar;

BOOL bReadRC;

static DWORD iBytesRead;

bReadRC = ReadFile(hCom, &rxchar, 1, &iBytesRead, NULL);

if (bReadRC) {

if (rxchar.GetByte(1) != NULL) {

return rxchar;

}

} // return 0 if no character read

}

This is syntax of dllCall:

$byteTmp = DllCall('commg.dll','str:cdecl','GetByte')

Is it good?

Thank you

Regards Roby

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#2 ·  Posted (edited)

Remember, DllCall passes an array. In the help file, it tells you about this return value.

Also, are you sure the C++ you posted even works? I don't understand you calling GetByte(1) on the char type. I didn't think it had any members.

Edited by Richard Robertson

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#3 ·  Posted (edited)

Remember, DllCall passes an array. In the help file, it tells you about this return value.

Also, are you sure the C++ you posted even works? I don't understand you calling GetByte(1) on the char type. I didn't think it had any members.

I apologize.

I posted my test...

Please, tell me a right way, if you know it.

My problem is pass a char to dllCall.. In dllCall the type is : str:cdecl ???

tank you

Edited by roby

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Hi Jon,

many compliments for your work AUTOIT....

Please, have you a example for my problem.. All my tests, dont' work..

I need help, please. I don't know to do.. I am not a c++ programmer..

Tank you

Roby

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