VPE versions prior to v4.0 are not Windows Vista compatible

[IDEAL Software Support]

We detected a severe problem on Windows Vista with all VPE versions prior to v4.0:

It can happen that lines of text disappear randomly in the preview.
Printing or export to PDF is not affected.

We researched the problem and also discussed it with Microsoft. In our opinion this is a bug in Vista. We tested several things in our code and it seems that Vista does not update portions of the screen as it should. For example, when we draw a simple line together with the text, the problem does not occur. The problem does also not occur, if the grid drawing is turned on. The problem does also not occur when Vista is in "Classic Design", i.e. without Glass.

All VPE versions prior to v4.0 are not specified to work on Vista, as written in the License Agreement. We strongly recommend to use VPE v4.0 or higher on Windows Vista.

After Microsoft could not provide any help to solve the problem, we researched a workaround which is implemented into VPE v4.0 and higher. This workaround solves the problem completely.

Regards
Thorsten Radde
IDEAL Software GmbH