Example Analysis of the COM component Initialization Method in C ++

Example Analysis of the COM component Initialization Method in C ++

This example describes how to initialize the COM component in C ++. Share it with you for your reference. The details are as follows:

BCB is used here

Initialization is required when using components such as TADOConnect.

Call interface:

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1 2	CoInitialize (NULL); // initialize the COM suite CoUninitialize (); // release the COM suite

Call in the DLL entry:

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Static bool isCoInitialize = false; // whether it is self-initiated 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 (); // It is released only when it is initialized. Otherwise, it is released by other initialization places, // Prevent other callers from failing due to wrong release } Return 1; }

I hope this article will help you with C ++ programming.