why display nothing?

[Mike_new]

Thank you,Dear Mike.I will try.

[Mike_new]

Dear Mike,
Thank you for your answer.The difference between these two computers is, one compter which I program on ,the other is not. Could you...

[Mike_new]

I program on window7 and run the exe file on window7....

[Mike_new]

I create a viewer with programming(Qt4.6.3+Openinventor8.02),it is ok. When I put the programs(dlls and exe) files on the other computer,the black viewer...