window show incorrect

[silentyears]

sorry, i can't make it clear by the subject., so i describe the question here, i create two frameWindow named A and B, and i set both the property "Rise On click " and "ZOrderChangeEnabled" for True. The result turns out that when i click A, then i can move it but B cover the part of A, and vice versa. Why does it like this?
I check the samples to compare, and i don't find any property setting in .layout, and it works fine, but when i clear the "Rise On click " and "ZOrderChangeEnabled" , it still does't work, so i want to know how to achieve the effect?
By the way, i use opengl in mfc.
Thanks!

[Kulik]

No idea, no info in this post.