DOCUMENT:Q148331 08-FEB-2000 [foxpro] TITLE :PRB: Cannot Open Form That Has =CREATEOBJECT() Property Value PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:3.0,3.0b OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b ------------------------------------------------------------------------------- SYMPTOMS ======== If a form property is assigned the value =CREATEOBJECT() with the WriteExpression() method, the form can no longer be opened in the Form Designer. If an attempt is made to open the form, the error message "Data type is invalid for this property" is displayed and the Form Designer is not opened. CAUSE ===== Although WriteExpression allows storing an object reference to a form property, this is not valid in Visual FoxPro. STATUS ====== This behavior is by design. MORE INFORMATION ================ Steps to Reproduce Behavior --------------------------- 1. Create a program that contains the following code: IF FILE('myform.scx') ERASE myform.scx ERASE myform.sct ENDIF CLEAR TYPEAHEAD KEYBOARD '{ALT+M}pmyprop{ENTER}' KEYBOARD '{ALT+F}cy' CREATE FORM myform MODIFY FORM myform NOWAIT =ASELOBJ(x,1) x(1).WRITEEXPRESSION('myprop',"=CREATEOBJECT('commandbutton')") CLEAR TYPEAHEAD KEYBOARD 'Y' CLOSE ALL 2. Run the program. 3. Try to open the Myform form in the Form Designer by choosing Open from the File menu. Select Form under Files of Type, and then select Myform. The message "Data type is invalid for this property" will be displayed and the Form Designer does not open. NOTE: If =CREATEOBJECT() is entered through the property sheet, the error message is displayed and the property is reset to its original value. How to Repair the Form ---------------------- If the form cannot be opened (as described in Step 3), you can repair it by using this procedure: 1. Make a backup copy of the form's .scx and .sct files: " Copy file .scx to file .sbx Copy file .sct to file .sbt " (without the quotation marks) 2. Open the form's .scx file as a table by entering the following commands in the Command window: USE .scx BROWSE FIELDS properties FOR UPPER("(crea") $ UPPER(properties) 3. Double-click the word Memo. Then find and remove the following line where PropertyName is the name of the property assigned the =CREATEOBJECT() expression: =CREATEOBJECT() NOTE: Do not change any other lines. Changing any other lines may render the form unusable. 4. Type a USE command in the Command window to close the .scx file. You should now be able to open the form in the Form Designer. If the form opens properly, you can delete the backup files created in Step 1. Additional query words: VFoxWin ====================================================================== Keywords : Technology : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b Version : WINDOWS:3.0,3.0b ============================================================================= 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 2000.