DOCUMENT:Q191864 26-AUG-1998 [vbwin] TITLE :PRB: Error 743 Adding ActiveX Controls to Control Collection PRODUCT :Microsoft Visual Basic for Windows PROD/VER: OPER/SYS:WINDOWS KEYWORDS: ====================================================================== --------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 6.0 --------------------------------------------------------------------- SYMPTOMS ======== When dynamically adding a large number of ActiveX controls into a Form's Controls Collection, you receive the following: "Error 743. Unable to create or activate a new instance of ." RESOLUTION ========== While this situation has been reported as a bug, this is an application design problem and the best solution is "Don't do this." If you have encountered this problem, you are probably using controls where you should be using objects. Consider using a Class, ActiveX DLL, or ActiveX EXE to create your objects. If you must use controls, consider using windowless controls as they are less resource-intensive. Keep in mind that forms with hundreds of visible controls will be confusing for the end user. If the controls are not being displayed, then there is no reason to use a control. ActiveX controls have a great deal of "overhead" when compared to an object. STATUS ====== This behavior is by design. MORE INFORMATION ================ Steps to Reproduce Behavior --------------------------- 1. Start a new Standard EXE project in Visual Basic. Form1 is created by default. 2. Choose Add Project from the File menu to add an ActiveX Control project. 3. Place an instance of UserControl1 on Form1. 4. Place a CommandButton on Form1. 5. Add the following code to the module of Form1: Private Sub Command1_Click() Dim i As Integer On Error GoTo trap For i = 1 To 1000 Me.Controls.Add "project2.usercontrol1", "control" & i Next Debug.Print "Finished" Exit Sub trap: If Err.Number = 743 Then Debug.Print "Error 743 loading control #" & i End If End Sub 6. Run the project. You should see the message in the immediate window indicating that the error occurred. Additional query words: kbDSupport kbDSD kbVBp kbVBp600 kbCtrl ====================================================================== Platform : WINDOWS Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1998.