Parameters fActive Value of the low-order word of wParam. Specifies whether the window is being activated or deactivated. This parameter can be one of the following values. Value Meaning WA_ACTIVE Activated by some method other than a mouse click (for example, by a call to the SetActiveWindow function or by use of the keyboard interface to select the window). WA_CLICKACTIVE Activated by a mouse click. WA_INACTIVE Deactivated. fMinimized Value of the high-order word of wParam. Specifies the minimized state of the window being activated or deactivated. A nonzero value indicates the window is minimized. hwndPrevious Value of lParam. Handle to the window being activated or deactivated, depending on the value of the fActive parameter. If the value of fActive is WA_INACTIVE, hwndPrevious is the handle to the window being activated. If the value of fActive is WA_ACTIVE or WA_CLICKACTIVE, hwndPrevious is the handle to the window being deactivated. This handle can be NULL. 另外还有两个相关消息: WM_MOUSEACTIVE 和 WM_NCACTIVE
fActive = LOWORD(wParam); // activation flag
fMinimized = (BOOL) HIWORD(wParam); // minimized flag
hwndPrevious = (HWND) lParam; // window handle
Parameters
fActive
Value of the low-order word of wParam. Specifies whether the window is being activated or deactivated. This parameter can be one of the following values. Value Meaning WA_ACTIVE Activated by some method other than a mouse click (for example, by a call to the SetActiveWindow function or by use of the keyboard interface to select the window).
WA_CLICKACTIVE Activated by a mouse click.
WA_INACTIVE Deactivated.
fMinimized
Value of the high-order word of wParam. Specifies the minimized state of the window being activated or deactivated. A nonzero value indicates the window is minimized. hwndPrevious
Value of lParam. Handle to the window being activated or deactivated, depending on the value of the fActive parameter. If the value of fActive is WA_INACTIVE, hwndPrevious is the handle to the window being activated. If the value of fActive is WA_ACTIVE or WA_CLICKACTIVE, hwndPrevious is the handle to the window being deactivated. This handle can be NULL. 另外还有两个相关消息:
WM_MOUSEACTIVE 和 WM_NCACTIVE
我改用其他办法来处理了,没再找需要hook那些消息才能知道工作窗口切换了。还是很感谢!