wmid

| BS_CENTER, 250,100, 50, 20, g_hWnd, (HMENU) ID_BUTTON_SWEEP, hInst, NULL); if (! G_hWnd) {return FALSE;} ShowWindow (g_hWnd, nCmdShow); UpdateWindow (g_hWnd); return TRUE;} // (window) message Processing lresult callback WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; switch (message) {case WM_COMMAND: wmId = LOWORD (wParam ); // wmEvent = HIWO

window procedure function is as follows: Lresult callback WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { Int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; Switch (message) { Case WM_COMMAND: WmId = LOWORD (wParam ); WmEvent = HIWORD (wParam ); // Parse the menu selections: Switch (wmId) { Case IDM_ABOUT: DialogBox (hInst, MAKEINTRESOURCE (IDD_ABOUTB

UINT uFormat // text-drawing options);5. Write the program: Design a line of text on the window, the text can scroll to the left in the window display, and each display round, change the color and font.The main code of the program is as follows:static int flag=0;int x=0;LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM WPARAM, LPARAM LPARAM){???? int Wmid, wmevent;???? Paintstruct PS;???? HDC hdc;???? RECT Clientrect;???? TCHAR szhello[max_l

main window.#003 //#004 // Cai junsheng 2007/07/12 QQ: 9073204#005 //#006 lresult callback wndproc (hwnd, uint message, wparam, lparam)#007 {#008 int wmid, wmevent;#009 paintstruct pS;#010 HDC;#011#012 switch (Message)#013 {#014 case wm_command:#015 wmid = loword (wparam );#016 wmevent = hiword (wparam );#017 // menu option command response:#018 switch (wmid)#01

. The address has been determined during compilation. Because it needs to be set in the registered window type, as follows: #008 atom myregisterclass (hinstance) #009 { #010 wndclassex wcex; #011 #012 wcex. cbsize = sizeof (wndclassex ); #013 #014 wcex. Style = cs_hredraw | cs_vredraw; #015 wcex. lpfnwndproc = wndproc; Row 15th is the message processing function of the window. The defwindowproc function declaration is as follows: Lresult defwindowproc (hwnd, Uint MSG, Wparam, Lparam ); This fun

downs (WM_XBUTTONDOWN or WM_XBUTTONUP) messages. For all messages, the lParam parameter passed in by the window procedure function contains the cursor position, where the base position is the x coordinate and the high position is the y coordinate, these coordinate values are relative to the values in the upper left corner of the window client area, and wParam contains the state of the mouse button.Instance Key code // The example program demonstrates how to wait for the left-click message to d

# Include // Test code lresult callback wndproc (hwnd, uint message, wparam, lparam) {int wmid, wmevent; paintstruct pS; HDC; Switch (Message) {Case wm_command: wmid = loword (wparam); wmevent = hiword (wparam); // select switch (wmid) {default: Return defwindowproc (hwnd, message, wparam, lparam); Case idm_x0_y0: savewndtojpeg (get1_topwindow (), false, false,

order to facilitate the removal of unnecessary code, two menus are added: idm_sendmessage and idm_postmessage. The following lists the simplified code. Message loop: Ln000: While (getmessage ( MSG, null, 0, 0 )) Ln001 :{ Ln002: translatemessage ( MSG ); Ln003: dispatchmessage ( MSG ); Ln004 :} Message Processing functions: Ln100: lresult callback wndproc (hwnd, uint message, wparam, lparam) Ln101 :{ Ln102: int wmid, wmevent; Ln10

// #008 lresult callback wndproc (hwnd, uint message, wparam, lparam) #009 { #010 int wmid, wmevent; #011 paintstruct pS; #012 HDC; #013 #014 switch (Message) #015 { #016Case wm_command: #017 wmid = loword (wparam ); #018 wmevent = hiword (wparam ); #019//Menu option command response: #020 switch (

handle, the destination does not need to be explicitly specified. When a message is received in the target window, the window procedure function is executed and processed based on different messages. Because the window procedure function and the window class name have a corresponding relationship when registering the window. When creating a window, we use the window class name again. Therefore, we can infer that the window handle and Window Process letter obtained after the window is created ar

parameters for message { N Bsp , NB Sp , NB Sp //additional information int wmid, wmevent; Paintstruct PS; //saved the window drawing information hdc hdc; //the handle of the element in the window TCHAR szhello[max_loadstring]; //defines a double-byte string LOADSTRING (HInst, Ids_hello, Szhello, max_loadstring); //the character in the Resource table to the Szhello variable switch (message) //Select message {case WM_C

window. #005 // #006 // Cai junsheng 2007/07/12 #007 // #008 lresult callback WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) #009 { #010 int wmId, wmEvent; #011 PAINTSTRUCT ps; #012 HDC hdc; #013 #014 switch (message) #015 { #016 case WM_COMMAND: #017 wmId = LOWORD (wParam ); #018 wmEvent = HIWORD (wParam ); #019 // menu option command response: #020 switch (

cursor is displayed. The beginpaint and endpaint functions are declared as follows:WinuserapiHDCWinapiBeginpaint (_ In hwnd,_ Out lppaintstruct lppaint ); WinuserapiBoolWinapiEndpaint (_ In hwnd,_ In const paintstruct * lppaint );HwndIs the window handle.LppaintIs to obtain the display parameters. Its structure is defined as follows:Typedef struct tagpaintstruct {HDC;Bool ferase;Rect rcpaint;Bool frestore;Bool fincupdate;Byte rgbreserved [32];} Paintstruct, * ppaintstruct;HDCIs to obtain the d

is created here. Unlike the previously created window, there is only one difference, that is, the setwindowlongptr function is called in row 24th to save the object pointer to the custom data of the window, in this way, the following static member function wndproc can be used to compile class members. As follows:#001 //#002 // function: wndproc (hwnd, uint, wparam, lparam)#003 //#004 // purpose: to process messages in the main window.#005 //#006 // Cai junsheng 2007/07/27 QQ: 9073204#007 //#008

Function//---------------------------------------------------------------------Lresult callback wndproc (hwnd, uint message, wparam, lparam){Int wmid, wmevent; Switch (Message ){Case wm_command: Wmid = loword (wparam );Wmevent = hiword (wparam ); Switch (wmid ){Case idm_about:Dialogbox (_ hinst,"Aboutbox ",Hwnd,(Dlgproc) about);Break; Case idm_exit:Destroywindow

message and the wm_paint message in the customer zone. // This section of code is taken from the code automatically generated by the vc6 Application Wizard, and some test code lresult callback wndproc (hwnd, uint message, wparam, lparam) {int wmid, wmevent; paintstruct pS; HDC; tchar szhello [max_loadstring]; loadstring (hinst, ids_hello, szhello, max_loadstring); Switch (Message) {Case wm_command: wmid =

form of awm_command message with cbn_selchange in the high-order wordOf the wparam parameter. Syntax CBN_SELCHANGE WPARAM wParam LPARAM lParam; Parameters Wparam The low-order word specifies the control identifier of the combo box. The high-order word specifies the notification message. Lparam Handle to the combo box. Process message code: Lresult callback wndproc (hwnd, uint message, wparam, lparam){Int

) {return FALSE;} ShowWindow (g_hWnd, nCmdShow); UpdateWindow (g_hWnd); return TRUE;} // (window) message Processing lresult callback WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; switch (message) {case WM_COMMAND: wmId = LOWORD (wParam ); // wmEvent = HIWORD (wParam); switch (wmId) {case when: OnButt

: Idm_sendmessage, idm_postmessage. The necessary code after simplification is listed below.Message loop:Ln000:while (GetMessage (msg, NULL, 0, 0))ln001:{Ln002:translatemessage (MSG);Ln003:dispatchmessage (MSG);LN004:}Message handler functions:Ln100:lresult CALLBACK WndProc (HWND hwnd, UINT message, WPARAM WPARAM, LPARAM LPARAM)ln101:{Ln102:int Wmid, wmevent;Ln103:switch (Message)Ln104: {Ln105:case Wm_command:Ln106:

, added two menus, the IDs are: Idm_sendmessage, idm_postmessage. The necessary code after simplification is listed below.Message loop:Ln000:while (GetMessage (msg, NULL, 0, 0))ln001:{Ln002:translatemessage (MSG);Ln003:dispatchmessage (MSG);LN004:}Message handler functions:Ln100:lresult CALLBACK WndProc (HWND hwnd, UINT message, WPARAM WPARAM, LPARAM LPARAM)ln101:{Ln102:int Wmid, wmevent;Ln103:switch (Message)Ln104: {Ln105:case Wm_command:Ln106: