DOCUMENT:Q177094 11-JAN-2001 [vbwin] TITLE :PRB: ActiveX Control Cannot Assign Run-Time Read-Only Property PRODUCT :Microsoft Visual Basic for Windows PROD/VER: OPER/SYS: KEYWORDS:kbGrpDSVB ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 - Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 - Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When your Usercontrol attempts to expose a run-time read-only property of a constituent control, you get the following error: Compile Error: Can't Assign to Read-Only Property CAUSE ===== The run-time read-only properties of constituent controls cannot be exposed. Because properties of the UserControl object and constituent controls are exposed by delegation, you cannot expose design-time-only properties such as Appearance and ClipControls. The settings you choose for such properties will be fixed for your ActiveX control. STATUS ====== This behavior is by design. MORE INFORMATION ================ Steps to Reproduce Behavior --------------------------- 1. Start a new ActiveX Control project in Visual Basic. UserControl1 is created by default. 2. Add a text box to UserControl1. 3. Copy the following code to the Code window of UserControl1: Option Explicit Property Let Multiline(b As Boolean) Text1.Multiline = b End Property Property Get Multiline() As Boolean Multiline = Text1.Multiline End Property 4. Close UserControl1. 5. Add a Standard EXE project to the project group by completing the following steps: 1. From the File Menu, click Add Project. The Add Project dialog box displays. 2. Click Standard EXE and click Open to close the Add Project dialog box and open the Form1 form of the second project. 6. Add Usercontrol1 to Form1. 7. In the Properties window for the Usercontrol, attempt to set the MultiLine property to True and note that you receive the compile error described above. REFERENCES ========== "Exposing Properties of Constituent Controls", Books Online Additional query words: kbVBp500 kbVBp600 kbVBp kbdsd kbDSupport KBCONTROL KBCTRLCREATE ====================================================================== Keywords : kbGrpDSVB Technology : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVBA500 kbVBA600 kbVB500 kbVB600 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 2001.