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I create (not show!) a form F containing a QuickRep component containing a QrChart in a QrBand. I call QuickReport.ShowModeless. In the ‘OnPreview’ event of the QuickRep component I set a QrPreview at another form as destination of printing the QuickReport:
QRPreview1.QRPrinter := TQRPrinter(Sender);
On deleting the form F the error 1400 (Invalid window handle) occurs on destroying the QrChart component (which in fact really has not an associated window). Without the QrChart everything is ok.
The problem exists with Delphi 6, C++Builder 5, C++Builder 6 with QuickReport Pro 3.62, 4.0 and TeeChart 7.03, 7.04
The only workaround I found is a call of F.Show before QuickReport.ShowModeless. Remember: This is not necessary for all other components in a QuickReport!
Could you please fix the problem?

Thanks in advance

Behalves Bert Kreisel

Hi Bert,

perhaps the problem is TeeChart sources are not 100% thread safe so when using PreviewModal, strange things might happen. The workaround/solution is to use Preview instead of PreviewModal when your reports contain TQRChart component.

Hi Pep,

Thanks for the reply. The suggested workaround/solution (using Preview instead of PreviewModal) does not work for me:
The QrPreview component is on an ActiveForm, i.e. its an ActiveX control insertable in an AxtiveX container like IExplorer. A call of Preview wold block the entire container wich is not acceptable. So I have to keep my workaround (F.Show; F.Visible := false;F.QuickRep.ShowModeless;).
Remember: This is not necessary for all other components in a QuickReport!
Could you please fix the problem?

Thanks in advance

Behalves Bert Kreisel

Hi Bert,

ok. Yes, I've added it on our defect list so it can be fixed for the next releases. Thanks for the report.

hello!

Has this bug been fixed?

In version 7.07 for Delphi 6 we still get Access Violation.
A Fix for this is urgent.

Best Regards,

Pontus

Nilex AB

Hi Pontus,

I'm afraid this (TV52010483) hasn't been fixed yet. I've increased its priority in the bug list so to be fixed sooner.