SendMessage参数大全（国外英文资料）.doc

SendMessage参数大全（国外英文资料） Daqo SendMessage parameters Windows is a message driven system, SendMessage messaging between applications and application is one of the main means, here I collect the SendMessage function parameter is introduced in detail, for personal use. VFP statement: DECLARE an INTEGER SendMessage IN user32; The INTEGER hWnd,; The INTEGER wMsg,; The INTEGER wParam,; The INTEGER lParam Parameter 1: hWnd - window handle. A window can be any type of screen object. Parameter 2: wMsg - used to distinguish the constant values of other messages. Parameter 3: wParam - usually a constant value associated with the message, or a handle to a window or control. Parameter 4: lParam - is usually a pointer to data in memory. WMsg parameter constant values: # DeFine WM_CREATE message handler 0 x01 Create a window # DeFine WM_DESTROY 0 x02 Send when a window is broken # DeFine WM_MOVE 0 x03 Move a window # DeFine WM_SIZE 0 x05 Change the size of a window # DeFine WM_ACTIVATE 0 x06 A window is activated or inactive # DeFine WM_SETFOCUS 0 x07 A window gets the focus # DeFine WM_KILLFOCUS 0 x08 A window loses focus # DeFine WM_ENABLE 0 x0a A window changes to Enable state # DeFine WM_SETREDRAW 0 x0b Set the window to see if you can redraw # DeFine WM_SETTEXT 0 x0c The application sends this message to set the text of a window # DeFine WM_GETTEXT 0 x0d The application sends this message to copy the text to the buffer that corresponds to the window # DeFine WM_GETTEXTLENGTH 0 x0e The length of the text associated with a window (not including empty characters) # DeFine WM_PAINT 0 x0f Ask a window to redraw itself # DeFine WM_CLOSE 0 x10 Send a signal when a window or application is closed # DeFine WM_QUERYENDSESSION 0 x11 When the user chooses to end the dialog or the program itself calls the ExitWindows function # DeFine WM_QUIT 0 x12 To end the program run # DeFine WM_QUERYOPEN 0 x13 This message is sent to an icon when the user window resumes the previous size location # De