A、WM_PAINT B、WM_COMMAND C、WM_CREATE D、WM_CLOSE
A、WM_CHAR B、WM_COMMAND C、WM_CREATE D、WM_PAINT
A、窗口最初创建时 B、窗口移动后部分区域由不可见变为可见 C、窗口大小改变后 D、滚动条滚动后
A、WM_CHAR B、WM_HSCROLL C、WM_VSCROLL D、WM_CHANGE
A、WM_KEYDOWN B、WM_LBUTTONDOWN C、WM_LEFT D、WM_RBUTTONDOWN
A、A.VK_UP B、B.WM_KEYDOWN C、C.WM_KEYUP D、D.VK_DOWN
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