SendMessage参数大全(国外英文资料).docVIP

SendMessage参数大全(国外英文资料) SendMessage parameter Daquan Windows is a message driven system, SendMessage is one of the main means of message transfer between the application and the application, here I collected the detailed parameters of SendMessage function are introduced, in order to prepare for. VFP statement: DECLARE, INTEGER, SendMessage, IN, user32; INTEGER hWnd,; INTEGER wMsg,; INTEGER wParam,; INTEGER lParam Parameter 1:hWnd- window handle. The window can be any type of screen object. The parameter 2:wMsg- is used to distinguish constant values from other messages The parameter 3:wParam- is usually a constant value associated with the message, or it may be a handle to the window or control The parameter 4: lParam- is usually a pointer to data in memory. WMsg parameter constant value: #DeFine WM_CREATE 0x01 Create a window #DeFine WM_DESTROY 0x02 Send when a window is broken #DeFine WM_MOVE 0x03 Move a window #DeFine WM_SIZE 0x05 Change the size of a window #DeFine WM_ACTIVATE 0x06 A window is activated or the active state is not active #DeFine WM_SETFOCUS 0x07 A window gets the focus #DeFine WM_KILLFOCUS 0x08 A window loses focus #DeFine WM_ENABLE 0x0A A window is changed to a Enable state #DeFine WM_SETREDRAW 0x0B If you can set the window redraw #DeFine WM_SETTEXT 0x0C The application sends this message to set the text of a window #DeFine WM_GETTEXT 0x0D The application sends this message to copy the text of the corresponding window to the buffer #DeFine WM_GETTEXTLENGTH 0x0E Gets the length of the text associated with a window (excluding null characters) #DeFine WM_PAINT 0x0F A window redraw itself #DeFine WM_CLOSE 0x10 Sends a signal when a window or application closes #DeFine WM_QUERYENDSESSION 0X11 When the user selects the end dialog or the program itself, the ExitWindows function is called #DeFine WM_QUIT 0x12 Used to end the program running #DeFine WM_QUERYOPEN 0x13 When the user window restores the previous size position, send the message to an icon #