PRB: Updated Win32s Incompatible with VFP3.0b under DBCS Win3.1

• Microsoft Visual FoxPro for Windows, version 3.0b

SYMPTOMS

The updated Win32s subsystem v.1.30c Pw1118.exe, which can be download from ftp://microsoft.com/softlab/mslfiles/, is not DBCS (Double-Byte Character Set) enabled. Even though you can apply this patch to Double-Byte Character Windows 3.1 (DBCS Windows 3.1, like the Traditional Chinese Windows), you may run into problems if you deal with Double-Byte Characters (DBC) under Visual FoxPro version 3.0b.

CAUSE

Win32s subsystem v.1.30c is not Double-Byte Character Set (DBCS) enabled.

RESOLUTION

Apply the original Win32s version 1.30 that was included with the localized Visual FoxPro version 3.0b CD.

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce Behavior

1. Install Visual FoxPro version 3.0b under the Double-Byte Character Set (DBCS) version of Windows 3.1, such as the Chinese Windows version 3.1.

2. In the FoxPro Command window type the following:

         ? at_c(Char1,string1)
   

   NOTE: "String1" is a Chinese string and "Char1" is a particular Chinese character.

• If the string is composed of three Chinese Characters with the Input Method Editor (IME) code of "A7A7,""A8A8," and "A9A9" and Char1 is "A8A8," the AT_C() command returns a 2. This means that Char1 is at the second numeric position within string1, counting from the leftmost character. This result is correct.
• If Char1 is replaced with "A7A8," then AT_C() returns a 0. This means there is not any matching Chinese Characters within string1. This is also correct.

Observations after Win32s Version 1.3c is installed:

• After repeating step two as listed in Observations above, AT_C() returns a 3 because it incorrectly interprets the Chinese string as six single byte characters rather than three Chinese words.
• AT_C() incorrectly returns a 2 because of the same reason listed above.

REFERENCES

For information about removing and reinstalling Win32s to your system, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q129979
   TITLE     : How to Reinstall Win32s with Visual FoxPro