PRB: Enumerated Data Types in DBGRID32.OCX

• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, versions 5.0, 6.0

SYMPTOMS

When using the Microsoft Data Bound Grid Control (DBGRID32.OCX) in Visual Basic, one of two symptoms can occur:

1. The autolist may not drop down enumerated types for some declared properties.
   
   -or-



2. In the Object Browser, some enumerated types cannot be viewed because they are hidden.

CAUSE

The enum data types for the Data Bound Grid Control are defined in the Type Library. The constants defined in the those enum data types are hidden; therefore, you cannot view the contents of the enum datatypes.

RESOLUTION

If you are declaring a variable as:

   Dim x As enumSplitSizeModeConstants 

   Dim x As SplitSizeModeConstants 

STATUS

This behavior is by design.

MORE INFORMATION

Although the Microsoft Data Bound Grid Control (DBGRID32.OCX) ships with Visual Basic 6.0, a new control called the Microsoft DataGrid Control 6.0 (MSDATGRD.OCX) is also included with Visual Basic 6.0. This new control does not exhibit the above-mentioned behavior.

Steps to Reproduce the Autolist Drop Down Behavior

1. Start Visual Basic and open a Standard EXE project. Form1 is created by default.



2. Under the Project menu, select Components. A dialog will be shown that lists all the available controls. In the Controls tab, check the "Microsoft Data Bound Grid Control" (DBGRID32.OCX), then click OK. The control will be added to the Visual Basic components toolbar.



3. Add a DBGrid control to Form1.



4. In any event procedure, type the following code:

   
         Dim x As enumSplitSizeModeConstants
    




5. When you type "x =" you will notice that the autolist box does not appear as expected.



6. Now, change the DIM statement above to:

   
         Dim x As SplitSizeModeConstants
     




7. Notice that when you type "x =" you get a list of enumerated types.

Steps to Reproduce the Hidden Type in Object Browser Behavior

1. Start Visual Basic and open a Standard EXE project. Form1 is created by default.



2. Add the "Microsoft Data Bound Grid Control" (DBGRID32.OCX) to the Visual Basic components toolbar.



3. From the View Menu, select Object Browser or Press the F2 key.



4. Select MSDBGrid from the Project/Library drop-down list box.



5. Under the Classes list box, select Split.



6. Under the Members of "Split" list box, select SizeMode.



7. You will see in the bottom frame that SizeMode is declared as enumSplitSizeModeConstants.



8. Click on enumSplitSizeModeConstants. Visual Basic will display the message, "Cannot jump to 'enumSplitSizeModeConstants' because it is hidden."

Additional query words: kbDSupport kbDSD kbVBp kbVBp500 kbVBp600 kbCtrl

Keywords : kbGrpVB
Version :
Platform : WINDOWS
Issue type : kbprb