PRB: GetLineFromChar Method Does Not Function in VFP 5.0

ID: Q198425

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a

SYMPTOMS

The GetLineFromChar method of the Richtx32.ocx control returns erroneous values in Visual FoxPro 5.0x. This behavior happens with version 5.01.4316 and version 6.00.8169 of the Richtx32.ocx.

RESOLUTION

Turn off the ActiveX control dual interface (VTABLE binding) by adding the following line to the Load event of the form:


   =SYS(2333,0)

MORE INFORMATION

The GetLineFromChar method should return the line number containing a specified character position. This method returns valid values when running under Visual FoxPro 3.0b and 6.0.

Steps to Reproduce Behavior

Create a form and add a rich text control to the form.

In the Init method of the form, place the following code:


      Thisform.Olecontrol1.text=REPLICATE("a",200)

Add a text box to the form and name it Text1.

Add a command button that contains the following code:


      CLEAR
      foundline=THISFORM.olecontrol1.getlinefromchar(THISFORM.text1.VALUE)
      ?foundline
      THISFORM.REFRESH

Run the form. In the text box, type the following values, and pressing the command button after each number:
10
100
150
15
250

Instead of returning a valid line number you may see values in scientific notation, date time values, the word .NULL., a blank value, or a memory protection error may occur. The memory protection errors seem to occur mostly under Windows NT, but they can occur under Windows 95 or Windows 98.

REFERENCES

For additional information, please see the following article in the Microsoft Knowledge Base:

Q158765 INFO: NODUALINTERFACE Entry is Placed in Registry by VFP 5.0

Additional query words:

Keywords : kbActiveX kbContainer kbCtrl kbVFp500 kbVFp500a
Version : WINDOWS:5.0,5.0a
Platform : WINDOWS
Issue type : kbprb