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couninitialize函數(shù)
CoUninitialize函數(shù)是Windows提供的API函數(shù)，用于關(guān)閉當(dāng)前線程的COM Library。在應(yīng)用程序關(guān)閉時(shí)調(diào)用，因?yàn)閼?yīng)用程序隱藏其main窗口并通過其main消息循環(huán)之后對(duì)COM庫進(jìn)行的最后一次調(diào)用。

什么是coinitialize函數(shù)

coinitialize函數(shù)是COM(Component Object Model,組件對(duì)象模型)中的一個(gè)函數(shù)，用于初始化一個(gè)COM對(duì)象，在多線程環(huán)境下，每個(gè)線程都需要使用自己的COM對(duì)象，而coinitialize函數(shù)可以確保每個(gè)線程都有一個(gè)獨(dú)立的COM對(duì)象實(shí)例，這樣可以避免線程間的數(shù)據(jù)共享和同步問題，提高程序的穩(wěn)定性和性能。

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如何使用coinitialize函數(shù)

1、包含頭文件

要使用coinitialize函數(shù)，首先需要包含相應(yīng)的頭文件：

include

2、調(diào)用coinitialize函數(shù)

在使用coinitialize函數(shù)之前，需要先調(diào)用CoInitialize函數(shù)進(jìn)行初始化，CoInitialize函數(shù)的原型如下：

HRESULT CoInitialize(LPVOID *ppv);

ppv是一個(gè)指向指針的指針，用于接收初始化的COM庫的接口句柄，如果初始化成功，返回S_OK;否則，返回錯(cuò)誤代碼。

示例代碼：

include 
include 
include 
int main() {
    HRESULT hr = CoInitialize(NULL);
    if (SUCCEEDED(hr)) {
        std::cout << "初始化成功" << std::endl;
    } else {
        std::cout << "初始化失敗，錯(cuò)誤代碼：" << hr << std::endl;
    }
    return 0;
}

3、使用COM對(duì)象

在完成初始化后，就可以使用COM對(duì)象了，創(chuàng)建一個(gè)CView對(duì)象并顯示在一個(gè)窗口中：

include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include 
include  // Needed for CComObjectRootEx<>::FindClass() and CComPtr<>. Also needed for CComQIPtr<> and CComBSTR(). See the remarks section of this header file for more information on why these headers are necessary. The import directive is not needed because all of the types used in this header file are defined in WinNT.h as well as ATL/WTypes.h or ATL/AtlBase.h. If you do not have these headers included before including this header file, it will cause a compile time error. To fix this problem, include WinNT.h first, then include ATL/WTypes.h or ATL/AtlBase.h last. This header file also requires Windows SDK version >= v6.0A to work properly. If you do not have Windows SDK version >= v6.0A installed on your machine, you will need to install it before you can use this header file. You can download the latest version of Windows SDK from Microsoft's website at http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e5b478d9-f7a5-4c9e-8c3e-a2b3e5b8c3e5&displaylang=en. For more information about how to install the Windows SDK, see http://msdn.microsoft.com/en-us/library/ms235627%28VS.85%29.aspx. If you encounter any problems when using this header file, please refer to the following articles for help: http://msdn.microsoft.com/en-us/library/ms235619%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms678541%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms686761%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms686761%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms686761%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms686761%28VS.85%29.aspx http://msdn.microsoft.com/en-us/library/ms686761%28VS.85%29.aspx http://msdn

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