DOCUMENT:Q193593  02-OCT-1998  [vbwin]
TITLE   :PRB: Cannot Paste PrintScreen Result to OLE Control
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0,6.0
OPER/SYS:WINDOWS
KEYWORDS:

======================================================================
---------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual Basic Learning, Professional, and Enterprise Editions
   for Windows, versions 5.0, 6.0
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SYMPTOMS
========

Pressing the ALT+PRINTSCRN key combination turns the OLE control's PasteOK
property to False, and the bitmap in the clipboard cannot be pasted to the
OLE control.

CAUSE
=====

There are two kinds of Clipboard formats; one is the traditional format and
the other is the OLE format. Microsoft's Visual Basic OLE control is
designed to hold the objects that can either be linked or embedded in the
control. It requires the clipboard to contain the OLE information to be
pasted into it. However, after pressing the ALT+PRINTSCRN key combination,
the clipboard format is in the traditional format. For the same reason,
simple metafiles in the clipboard cannot be pasted into the OLE control
either.

RESOLUTION
==========

To workaround this problem, the clipboard format needs to be transformed
from traditional format to OLE format.

STATUS
======

This behavior is by design.

MORE INFORMATION
================

Steps to Reproduce and Work Around Behavior
-------------------------------------------

The following is an example of using a Rich Textbox to transform the
clipboard format from traditional format to OLE format and make the paste
possible. The basic idea is to paste the bitmap from the clipboard to a
Rich Textbox and then copy it back from the Rich Textbox to the clipboard.
In the example, the SendKeys function is used to paste to and copy from the
clipboard.

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

2. Put an OLE control on Form1 and keep the default name, OLE1. Click
   Cancel when the "Insert Object" dialog box comes up.

3. Put a CommandButton on Form1 and keep the default name, Command1.

4. Add the following code to the code window of Form1:

      Private Sub Command1_Click()
        if OLE1.PasteOk = True then
            OLE1.Paste
        else
            msgbox "Can not paste!"
        End if
      End Sub

5. Run the application. Pressing the ALT+PRINTSCRN key combination and then
   click the CommandButton. The message box "Can not paste!" is displayed,
   demonstrating the problem.

6. Stop the application.

7. Select Components from the Project menu and check "Microsoft Rich
   Textbox Control X.0."

8. Add a Rich Textbox to Form1 and keep the default name, RichTextBox1.
   Make sure its Visible property is set to True and its TabStop property
   is set to False. Make the Rich Textbox as small as possible and hide it
   under the CommandButton (because you don't want it to show on the
   screen). If necessary, right-click on the Rich Textbox and click "Send
   to Back."

9. Change the Command1_Click event handler to be:

      Private Sub Command1_Click()
        ' use RichTextBox to transform the clipboard info
        RichTextBox1.TextRTF = ""
        RichTextBox1.SetFocus
        SendKeys "^v", True
        SendKeys "^+{HOME}", True
        SendKeys "^c", True
        RichTextBox1.TextRTF = ""

        if OLE1.PasteOk = True then
            OLE1.Paste
        else
            msgbox "Can not paste!"
        End if
      End Sub

10. Run the application again. Press the ALT+PRINTSCRN key combination
   and then click on Command1. This time the screen capture is pasted to
   the OLE control.

Additional query words: kbDSupport kbDSD kbVBp kbVBp500 kbVBp600 kbOLE
kbClipboard
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Version           : WINDOWS:5.0,6.0
Platform          : WINDOWS
Issue type        : kbprb

=============================================================================

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