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IDProjectCategoryView StatusLast Update
0037908LazarusIDEpublic2020-10-11 13:22
ReporterDDDZZZ Assigned To 
Status newResolutionopen 
Product Version2.0.10 
Summary0037908: App's window appears wrong on Windows 10 (it blinks during the process)

The app window disappears smoothly and then abruptly arises when I toggle the state with its taskbar button. In addition, it blinks with white background for a while.
Neither the disappearing or appearing don't look like standard Win10 behavior. But the disappearing looks good, so appearing should be fixed too.

Steps To Reproduce1. Compile the source codes or just run the attached file
2. Increase window size a bit
3. Minimize and maximize the window by pressing on it's taskbar button


1. Just watch the attached video

I attached both source codes and video capture
Additional InformationP.S. The issue originally comes from but it seems it's Lazarus issue.

Lazarus 2.1.0 r63991
FPC 3.0.4
TagsNo tags attached.
Fixed in Revision
Attached Files



2020-10-11 13:18

reporter (1,030,284 bytes) (1,811,798 bytes)

Issue History

Date Modified Username Field Change
2020-10-11 13:18 DDDZZZ New Issue
2020-10-11 13:18 DDDZZZ File Added:
2020-10-11 13:18 DDDZZZ File Added: