Example analysis of COM component initialization method in C++

This article illustrates the method of COM component initialization in C++. Share with you for your reference. The details are as follows:

BCB is used here

Initialization is required when using components such as TADOConnect

Calling interface:

CoInitialize(NULL);//Initialize the COM suite
CoUninitialize();// The release of COM suite 

Call in DLL entry:

static bool isCoInitialize = false; //Is it your own initialization
int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void* lpReserved)
{
  if(reason==DLL_PROCESS_ATTACH)
  {
    if(ConInitialize(NULL) == S_OK) isCoInitialize = true;
  }
  if(reason==DLL_PROCESS_DETACH)
  {
    if(isCoInitialize) CoUninitialize();
    //If it is initialized by itself, it will be released. Otherwise, it will be released by other initializers.
    //Prevents an error release from causing another caller to fail
  }
  return 1;
}

Hope that the article described in the C++ programming to help you.