建站
咨詢
售后
建站咨詢
新聞中心
這里有您想知道的互聯(lián)網(wǎng)營銷解決方案
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)閉時調(diào)用，因為應(yīng)用程序隱藏其main窗口并通過其main消息循環(huán)之后對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,組件對象模型)中的一個函數(shù)，用于初始化一個COM對象，在多線程環(huán)境下，每個線程都需要使用自己的COM對象，而coinitialize函數(shù)可以確保每個線程都有一個獨立的COM對象實例，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。
創(chuàng)新互聯(lián)公司專注于柳州網(wǎng)站建設(shè)服務(wù)及定制，我們擁有豐富的企業(yè)做網(wǎng)站經(jīng)驗。 熱誠為您提供柳州營銷型網(wǎng)站建設(shè)，柳州網(wǎng)站制作、柳州網(wǎng)頁設(shè)計、柳州網(wǎng)站官網(wǎng)定制、成都小程序開發(fā)服務(wù)，打造柳州網(wǎng)絡(luò)公司原創(chuàng)品牌,更為您提供柳州網(wǎng)站排名全網(wǎng)營銷落地服務(wù)。
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，返回錯誤代碼。
示例代碼：
includeinclude 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，錯誤代碼：" << hr << std::endl; } return 0; }
3、使用COM對象
在完成初始化后，就可以使用COM對象了，創(chuàng)建一個CView對象并顯示在一個窗口中：
includeinclude 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
當(dāng)前文章：couninitialize函數(shù)
網(wǎng)頁鏈接：http://www.fisionsoft.com.cn/article/cophoge.html
