maybe a simple C++ project~ can you pls help?? thx very much

Can anyone pls tell me how to implement a timeout function in C++?? thx very much

I have created a 3D model and want to include a light source, after I created it, the colour of the whole model changed to one colour... moreover, the light source was not fixed in one position and changing all the time... can anyone pls tell me how to fix this and provide me some examples?? thx very much~~ :((:((:((

I have checked the depth testing is enabled and the buffer was clear each time... I doubt if the GLUPERSPECTIVE will also cause this problem... Can anyone tell me how to use this function ?? I have looked at the document of the GLUPERSPECTIVE but I dont think it really help... BTW, what does "clipping plane" mean ?? Thanks very much again and again... :((:((:((:((:((:((

In fact, the problem now is that, The six faces of the cube just like have their own 'priority', such that one specific face will always on top and then the second and third.... according to the 'priority'.... can this be solved ?? Thanks very much... :((:((:((:((:((:((

I had created a 3D cube so that it can rotates around a point. However, when the cube is drew, some faces will disappear in certain angle while other diappear in another angle. Can anyone please help why this occured ?? Or can anyone give some example on how to programme it?? Thanks very much!! :((:((:((:((

Can I have any examples ?? Also, I want to ask how can I open two dialog box at the same time when running an application?? thx very much!!:((:((

How can I displaying 2 dialogs in the same window ??:confused::confused: Are there any frame that can hold dialog ??:confused::confused: Or can one dialog hold more then one other dialog ??:confused::confused: Thank you very much!!:((:((:((