> I wroten a App On Qnx.I want to create three windows.
> Process 1:
> (1)In KdMain:
>     ①init the windows info(three windows).win_size/win_name and so on
>     ②init EGL (three times)
>       a.Get the display by eglGetDisplay()
>       b.init EGL by eglInitialize()
>       c.eglBindAPI()
>       d.kdCreateWindow()
>       e.kdRealizeWindow()
>       f.eglCreateWindowSurface()
>       g.kdSetWindowPropertyiv()
>       h.eglCreateContext()
>     ③create three threads by kdThreadCreate()
> (2)In each thread:
>     ①Draw the picture on each window by vgImageDraw()
>   the result is:
>     Three windows work OK.But,if any other thread sents event to the three 
> windows,they all receive the event by KdMain().
> 
> Process 2:
> (1)In KdMain
>    ①create three threads
> (2)In each thread:
>    ①init the windows info
>    ②init EGL( the steps the same as above )
>    ③create three threads by kdThreadCreate()
>    ④draw the picture on window by vgImageDraw()
> the result is:
>    Three thread work OK,each thread can receive event.But the picture is not 
> displayed on the windows.
> 
> So ,my question is :
> ①Must I init EGL in KdMain?
> ②Is there any problem with my process？
> 
> I excepting your responses,Thanks a lot.


PS:in vgImageDraw():
     eglMakeCurrent()→vgSeti()→vgCreateImage()→vgImageSubData()
     →vgDrawImage()→eglSwapBuffers()