Re: Calling dll functions

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"sb" <stormfire1@xxxxxxxxx> wrote in message news:u7ekkEMZGHA.4652@xxxxxxxxxxxxxxxxxxxxxxx
btw: you don't need to declare "Num" as an out parameter unless the DLL plans to change it.

-sb

"Mythran" <kip_potter@xxxxxxxxxxxxxxxxxxxxxx> wrote in message news:uDpQt5JZGHA.1348@xxxxxxxxxxxxxxxxxxxxxxx

"John" <John@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:0F784C81-9ED4-425D-8ADF-89BF15762C3A@xxxxxxxxxxxxxxxx
DWORD _stdcall DLLFunction(DWORD Num, CHAR *Str);

I call the above dll function from a C++ app. Now I need to call it from my
C# app. How can I do it?

[DllImport("MyDll.dll")]
public static extern int DLLFunction(int Num, string Info);

int Num;
string Info = new string(' ', 80);
DLLFunction(Num, Info);

I cannot get anything in variable Info. Please help. Thanks.

[DllImport("myDll.dll")]
public static extern int DLLFunction(out int Num, StringBuilder Info);

int Num;
string Info = new StringBuilder(80);
DLLFunction(out Num, Info);
string results = Info.ToString();

HTH,
Mythran




Well, if he compiled it as it was, he would get a compile-time error since Num has not been initialize, which is why I set it to "out" instead...but I should have noted that :)

Mythran

.

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