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About the STemWin of the STM32F4 Discovery.

Question asked by tsai.haha on Mar 26, 2016
I used the STemWin_SampleDemo from the STM32F4 Discovery SDK to run my program.
I find out that if I put WM into menu controls, when I delete(WM_DeleteWindow) the menu widget, that MCU will appear HardFault_Handler.
But emWin official simulation program can be successfully closed menu widget, it will not cause any problems on the memory.

So how can I solve this kind of situation?
Appreciate it.