KB190213 - BUG: Type Mismatch Error Comparing String With Byte Array

Article ID: 190213

Article Last Modified on 5/13/2003

Microsoft Visual Basic 6.0 Learning Edition
Microsoft Visual Basic 6.0 Professional Edition
Microsoft Visual Basic 6.0 Enterprise Edition

This article was previously published under Q190213

SYMPTOMS

In Visual Basic, if you have a function returning an array of bytes and you compare the return value with a string, you get the following error:

Compile Error: Type Mismatch

RESOLUTION

You can bypass this error if you convert the return value of the function using the function Cstr before comparing it with a string, as in the following code:

   If CStr(myFunc) <> "yes" Then

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

Create a new Standard EXE project in Visual Basic. Form1 is created by default.

Add a CommandButton to Form1 and paste the following code into the code window of Form1:

      Public Sub Command1_Click()
         If myFunc <> "yes" Then
            Stop
         End If
      End Sub

      Function myFunc() As Byte()
         myFunc = "yes"
      End Function

Press the F5 key to run the program.
Click on Command1. The error message "Compile Error: Type Mismatch" results.

Additional query words: kbDSupport kbVBp600bug kbdss kbVBp kbNoKeyWord

Keywords: kbbug KB190213