为什么createobject()不能使用？ Dim a as ObjectSet a = CreateObject("YourClassName") 解决方案 » 免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货 CreateObject 函数 创建并返回一个对 ActiveX 对象的引用。语法CreateObject(class,[servername]) CreateObject 函数的语法有如下部分：部分 描述 class 必需的； Variant (String). 要创建的应用程序名称和类。 servername 可选的； Variant (String). 要在其上创建对象的网络服务器名称。 class 参数使用 appname.objecttype 这种语法，包括以下部分：部分 描述 appname 必需的；Variant（字符串）。提供该对象的应用程序名。 objecttype 必需的；Variant（字符串）。待创建对象的类型或类。 说明每个支持自动化的应用程序都至少提供一种对象类型。例如，一个字处理应用程序可能会提供 Application 对象，Document 对象，以及 Toolbar 对象。要创建 ActiveX 对象，只需将 CreateObject 返回的对象赋给一个对象变量：'声明一个对象变量来存放该对象'的引用。Dim as Object 采用后期绑定方式。Dim ExcelSheet As ObjectSet ExcelSheet = CreateObject("Excel.Sheet")上述代码将启动该应用程序创建该对象，在本例中就是创建一个 Microsoft Excel 电子数据表。对象创建后，就可以在代码中使用自定义的对象变量来引用该对象。在下面的示例中，可以使用对象变量 ExcelSheet 来访问新建对象的属性和方法，以及访问 Microsoft Excel 的其它对象，包括应用程序对象和单元格集合。'设置 Application 对象使 Excel 可见ExcelSheet.Application.Visible = True'在表格的第一个单元中写些文本ExcelSheet.Cells(1, 1).Value = "This is column A, row 1"'将该表格保存到 C:\test.doc 目录ExcelSheet.SaveAs "C:\ TEST.DOC"'使用应用程序对象的 Quit 方法关闭 Excel。ExcelSheet.Application.Quit'释放该对象变量Set ExcelSheet = Nothing使用 As Object 子句声明对象变量，可以创建一个能包含任何类型对象引用的变量。不过，该变量访问对象是后期绑定的，也就是说，绑定在程序运行时才进行。要创建一个使用前期绑定方式的对象变量，也就是说，在程序编译时就完成绑定，则对象变量在声明时应指定类 ID。例如，可以声明并创建下列 Microsoft Excel 引用：Dim xlApp As Excel.Application Dim xlBook As Excel.WorkbookDim xlSheet As Excel.WorkSheetSet xlApp = CreateObject("Excel.Application")Set xlBook = xlApp.Workbooks.AddSet xlSheet = xlBook.Worksheets(1)前期绑定的变量引用可以提供更好的性能，但该变量只能存放声明中所指定的类的引用。可以将 CreateObject 函数返回的对象传给一个参数为对象的函数。例如，下面的代码创建并传递了一个 Excel.Application 对象的引用：Call MySub (CreateObject("Excel.Application"))可以在一个远端连网的计算机上创建一个对象，方法是把计算机的名称传递给 CreateObject 的 servername 参数。这个名称与共享名称的机器名部份相同：对于一个共享名称为 "\\\\MyServer\\Public," 的 servername 参数是 "MyServer" 。下面的代码返回在一个名为 MyServer 的远端计算机上运行的 Excel 实例的版本号：Dim xlApp As ObjectSet xlApp = CreateObject("Excel.Application", "MyServer")Debug.Print xlApp.Version如果远端服务器不存在或者不可用，则会发生一个运行时错误。注意 当该对象当前没有实例时，应使用 CreateObject。如果该对象已有实例在运行，就会启动一个新的实例，并创建一个指定类型的对象。要使用当前实例，或要启动该应用程序并加载一个文件，可以使用 GetObject 函数。如果对象已登记为单个实例对象，则不管执行多少次 CreateObject，都只能创建该对象的一个实例。 HOWTO: Use CreateObject with Visual C++ COM ObjectsID: Q192745 --------------------------------------------------------------------------------The information in this article applies to:Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, versions 5.0, 6.0--------------------------------------------------------------------------------SUMMARYThis article explains how to use CreateObject with COM/ActiveX components created in Visual C++. The CreateObject programming syntax used to create an instance of a component created in Visual Basic may not work with a VC++ component, even though the object can be created using the New method. For example, assume you have an component named "neuLib" referenced in a Visual Basic project. The component has one createable object (Interface) named "myclass." The following code will work if the ActiveX component was created using either Visual Basic or Visual C++: Dim objNeu as neuLib.myclass Set objNeu = New neuLib.myclass However, the code below will work only for a component created using Visual Basic: Dim objNeu as neuLib.myclass Set objNeu = CreateObject("neuLib.myclass") If this is a VC++-created component, you will receive the error message: "Error 429. ActiveX component can't create object." The reason CreateObject works with a Visual Basic component and not with a Visual C++ component can be explained and resolved by examining the different way in which Visual Basic and Visual C++ create program IDs (ProgID.) When you use CreateObject, the argument you provide is a ProgID. Visual Basic and Visual C++ assign a name to the ProgID differently. Visual Basic uses the original name, Visual C++ does not. In a Visual Basic component, the ProgID for this example is "neuLib.myclass." In a Visual C++ component, the ProgID would be "myclass.myclass.1," which requires the (correct) syntax: Dim objNeu as neuLib.myclass Set objNeu = CreateObject("myclass.myclass.1") MORE INFORMATIONThere are two ways to determine the ProgID that you need to specify when using CreateObject for the VC object. Use the OLE/Com Viewer. If you have this utility installed, start it and open the Visual C++ component. From the View menu, select Expert Mode. Select "All Objects" from the list in the left portion of the window. Scroll until you find the name of the class, then and click it. The detail window on the right should display the information about the class; the ProgID will be listed with this information, and will look like: ProgID = myclass.myclass.1 Use the Registry Editor (Regedit.exe). Click on the Start button and select Run. Type "Regedit" and click OK. From the Edit menu in Regedit, choose Find. Enter the name of the class, and make sure that "Data" is the only check box selected. Click OK. It is difficult to provide exact instructions for searching the Registry. The entry you are looking for will probably be the second one that is found (press the F3 key to resume searching.) When the data for the key is found, look in the window on the left half of the Regedit screen. If the tree node that is open says "ProgID," and the data in the window on the right contains the class name, then this is the value you want to use as the argument for CreateObject. Additional query words: kbDSupport kbDSD kbVBp kbVBp500 kbVBp600 kbCtrl kbActiveX kbCOMt Keywords : kbGrpVB Version : WINDOWS:5.0,6.0 Platform : WINDOWS Issue type : kbhowto Last Reviewed: January 5, 2000© 2000 Microsoft Corporation. All rights reserved. Terms of Use. 错误提示：word无法启动转换器mswrd632.wpc VB 逐行打印 面向服务结构中服务器如何回调客户端？ 用listview的时候 提示说：“索引超出边界”怎么解决？小生为新人 我感到很莫名其妙！！！！ 半年后工作,是学习vb还是vc好一点呢? 各位做完项目后拿奖金还是提成？ 想工作室个人信息管理系统发布 请大家给我指条明路 各位来哦？ 袁飞大哥能不能给我你的getdisksn的源码? 使用DataGrid1控件遇到了困难，请大侠帮助？
CreateObject 函数 创建并返回一个对 ActiveX 对象的引用。语法CreateObject(class,[servername]) CreateObject 函数的语法有如下部分：部分 描述
class 必需的； Variant (String). 要创建的应用程序名称和类。
servername 可选的； Variant (String). 要在其上创建对象的网络服务器名称。
class 参数使用 appname.objecttype 这种语法，包括以下部分：部分 描述
appname 必需的；Variant（字符串）。提供该对象的应用程序名。
objecttype 必需的；Variant（字符串）。待创建对象的类型或类。
说明每个支持自动化的应用程序都至少提供一种对象类型。例如，一个字处理应用程序可能会提供 Application 对象，Document 对象，以及 Toolbar 对象。要创建 ActiveX 对象，只需将 CreateObject 返回的对象赋给一个对象变量：'声明一个对象变量来存放该对象
'的引用。Dim as Object 采用后期绑定方式。
Dim ExcelSheet As Object
Set ExcelSheet = CreateObject("Excel.Sheet")上述代码将启动该应用程序创建该对象，在本例中就是创建一个 Microsoft Excel 电子数据表。对象创建后，就可以在代码中使用自定义的对象变量来引用该对象。在下面的示例中，可以使用对象变量 ExcelSheet 来访问新建对象的属性和方法，以及访问 Microsoft Excel 的其它对象，包括应用程序对象和单元格集合。'设置 Application 对象使 Excel 可见
ExcelSheet.Application.Visible = True
'在表格的第一个单元中写些文本
ExcelSheet.Cells(1, 1).Value = "This is column A, row 1"
'将该表格保存到 C:\test.doc 目录
ExcelSheet.SaveAs "C:\ TEST.DOC"
'使用应用程序对象的 Quit 方法关闭 Excel。
ExcelSheet.Application.Quit
'释放该对象变量
Set ExcelSheet = Nothing使用 As Object 子句声明对象变量，可以创建一个能包含任何类型对象引用的变量。不过，该变量访问对象是后期绑定的，也就是说，绑定在程序运行时才进行。要创建一个使用前期绑定方式的对象变量，也就是说，在程序编译时就完成绑定，则对象变量在声明时应指定类 ID。例如，可以声明并创建下列 Microsoft Excel 引用：Dim xlApp As Excel.Application Dim xlBook As Excel.WorkbookDim xlSheet As Excel.WorkSheetSet xlApp = CreateObject("Excel.Application")Set xlBook = xlApp.Workbooks.AddSet xlSheet = xlBook.Worksheets(1)前期绑定的变量引用可以提供更好的性能，但该变量只能存放声明中所指定的类的引用。可以将 CreateObject 函数返回的对象传给一个参数为对象的函数。例如，下面的代码创建并传递了一个 Excel.Application 对象的引用：Call MySub (CreateObject("Excel.Application"))可以在一个远端连网的计算机上创建一个对象，方法是把计算机的名称传递给 CreateObject 的 servername 参数。这个名称与共享名称的机器名部份相同：对于一个共享名称为 "\\\\MyServer\\Public," 的 servername 参数是 "MyServer" 。下面的代码返回在一个名为 MyServer 的远端计算机上运行的 Excel 实例的版本号：Dim xlApp As Object
Set xlApp = CreateObject("Excel.Application", "MyServer")
Debug.Print xlApp.Version如果远端服务器不存在或者不可用，则会发生一个运行时错误。注意 当该对象当前没有实例时，应使用 CreateObject。如果该对象已有实例在运行，就会启动一个新的实例，并创建一个指定类型的对象。要使用当前实例，或要启动该应用程序并加载一个文件，可以使用 GetObject 函数。如果对象已登记为单个实例对象，则不管执行多少次 CreateObject，都只能创建该对象的一个实例。
ID: Q192745 --------------------------------------------------------------------------------
The information in this article applies to:Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, versions 5.0, 6.0--------------------------------------------------------------------------------
SUMMARY
This article explains how to use CreateObject with COM/ActiveX components created in Visual C++. The CreateObject programming syntax used to create an instance of a component created in Visual Basic may not work with a VC++ component, even though the object can be created using the New method. For example, assume you have an component named "neuLib" referenced in a Visual Basic project. The component has one createable object (Interface) named "myclass." The following code will work if the ActiveX component was created using either Visual Basic or Visual C++: Dim objNeu as neuLib.myclass
Set objNeu = New neuLib.myclass However, the code below will work only for a component created using Visual Basic:
Dim objNeu as neuLib.myclass
Set objNeu = CreateObject("neuLib.myclass") If this is a VC++-created component, you will receive the error message: "Error 429. ActiveX component can't create object." The reason CreateObject works with a Visual Basic component and not with a Visual C++ component can be explained and resolved by examining the different way in which Visual Basic and Visual C++ create program IDs (ProgID.) When you use CreateObject, the argument you provide is a ProgID. Visual Basic and Visual C++ assign a name to the ProgID differently. Visual Basic uses the original name, Visual C++ does not. In a Visual Basic component, the ProgID for this example is "neuLib.myclass." In a Visual C++ component, the ProgID would be "myclass.myclass.1," which requires the (correct) syntax:
Dim objNeu as neuLib.myclass
Set objNeu = CreateObject("myclass.myclass.1") MORE INFORMATION
There are two ways to determine the ProgID that you need to specify when using CreateObject for the VC object. Use the OLE/Com Viewer. If you have this utility installed, start it and open the Visual C++ component. From the View menu, select Expert Mode. Select "All Objects" from the list in the left portion of the window. Scroll until you find the name of the class, then and click it. The detail window on the right should display the information about the class; the ProgID will be listed with this information, and will look like: ProgID = myclass.myclass.1
Use the Registry Editor (Regedit.exe). Click on the Start button and select Run. Type "Regedit" and click OK. From the Edit menu in Regedit, choose Find. Enter the name of the class, and make sure that "Data" is the only check box selected. Click OK. It is difficult to provide exact instructions for searching the Registry. The entry you are looking for will probably be the second one that is found (press the F3 key to resume searching.) When the data for the key is found, look in the window on the left half of the Regedit screen. If the tree node that is open says "ProgID," and the data in the window on the right contains the class name, then this is the value you want to use as the argument for CreateObject. Additional query words: kbDSupport kbDSD kbVBp kbVBp500 kbVBp600 kbCtrl kbActiveX kbCOMt Keywords : kbGrpVB
Version : WINDOWS:5.0,6.0
Platform : WINDOWS
Issue type : kbhowto
Last Reviewed: January 5, 2000
© 2000 Microsoft Corporation. All rights reserved. Terms of Use.