Search:

I answer my question myself(it was checked) :) - Yes. But when BeginPaint send WM_ERASEBKGND internally, the update rect is always {0,0,0,0}. Why?
I know that before returning BeginPaint validate...

Sorry, I was mistaken. In urect there is no always {0,0,0,0}. But my question still in force: Does DefWindowProc while processing WM_ERASEBKGND use update region or erase entire client area?

Hi,
I process WM_ERASEBKGND message for WS_CHILD window:


case WM_ERASEBKGND:
GetUpdateRect(hWnd,&urect,FALSE);
//...........


In urect i always get {0,0,0,0}. That's why I ask:...

What is an optimal size of buffer to send large file(>30Mb) over network?

There is a parameter - TCP Window Size. For example we have scale window size about 128Kb. If I'll use small buffer about...