子窗口控件(5)之编辑类and列表框类
子窗口控件中
wParam和lParam变量的含义
LOWORD(wParam)子窗口IDHIWORD(wParam)通知码lParam子窗口句柄
编辑控件的通知消息
EN_SETFOCUS编辑控件得到了输入焦点EN_KILLFOCUS失去了输入焦点EN_CHANGE编辑框的内容将变化EN_UPDATE内容已经变化EN_ERRSPACE编辑框没有空间了EN_MAXTEXT没有控件完成插入了EN_HSCROLL水平滚动条被单击了EN_VSCROLL垂直滚动条被单击了
常用函数
SendMessage(hwndEdit,WM_CUT,0,0);//剪切SendMessage(hwndEdit,WM_COPY,0,0);//复制SendMessage(hwndEdit,WM_CLEAR,0,0);//删除SendMessage(hwndEdit,WM_PASTE,0,0);//粘贴
获取编辑器的行数
iCount=SendMessage(hwndEdit,EM_GETLINECOUNT,0,0);//获取行数iOffset=SendMessage(hwndEdit,EM_LINEINDEX,iLine,0);//获取位移量iLength=SendMessage(hwndEdit,EM_LINELENGTH,iLine,0)//获取指定行的字符数量
#include <windows.h> #define ID_EDIT 1LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);TCHAR szAppName[] = TEXT ("PopPad1") ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){ HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, szAppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } return msg.wParam ;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){ static HWND hwndEdit ; switch (message) { case WM_CREATE : hwndEdit = CreateWindow (TEXT ("edit"), NULL, WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL | WS_BORDER | ES_LEFT | ES_MULTILINE | ES_AUTOHSCROLL | ES_AUTOVSCROLL, 0, 0, 0, 0, hwnd, (HMENU) ID_EDIT, ((LPCREATESTRUCT) lParam) -> hInstance, NULL) ; return 0 ; case WM_SETFOCUS : SetFocus (hwndEdit) ; return 0 ; case WM_SIZE : MoveWindow (hwndEdit, 0, 0, LOWORD (lParam), HIWORD (lParam), TRUE) ; return 0 ; case WM_COMMAND : if (LOWORD (wParam) == ID_EDIT) if (HIWORD (wParam) == EN_ERRSPACE || HIWORD (wParam) == EN_MAXTEXT) MessageBox (hwnd, TEXT ("Edit control out of space."), szAppName, MB_OK | MB_ICONSTOP) ; return 0 ; case WM_DESTROY : PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ;}
效果图如下：
列边框通知码
通知码值LBN_ERRSPACE-2LBN_SELCHANGE1LBN_DBLCLK2LBN_SELCANCEL3LBN_SETFOCUS4LBN_KILLFOCUS5
常用方法：
iCount=SendMessage(hwndList,LB_GETCOUNT,0,0);//获取总的项目数iIndex=SendMessage(hwndList,LB_GETCURSEL,0,0);//获取第几行iLength=SendMessage(hwndList,LB_GETTEXTLEN,iIndex,0);//获取指定行有多少个字符
下面看一段完整的代码，虽然有点恶心；
#include<windows.h>#include<windowsx.h>LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // message identifier WPARAM wParam, // first message parameter LPARAM lParam // second message parameter);HINSTANCE hInst;int WINAPI WinMain( HINSTANCE hInstance, // handle to current instance HINSTANCE hPrevInstance, // handle to previous instance LPSTR lpCmdLine, // command line int nCmdShow // show state){static TCHAR szAppName[]=TEXT("leidemingzi");HWND hwnd;MSG msg;WNDCLASS wndclass;hInst=hInstance;wndclass.cbClsExtra=0;wndclass.cbWndExtra=0;wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);wndclass.hIcon=LoadIcon(NULL,IDI_ERROR);wndclass.hInstance=hInstance;wndclass.lpfnWndProc=WindowProc;wndclass.lpszClassName=szAppName;wndclass.lpszMenuName=NULL;wndclass.style=CS_HREDRAW|CS_VREDRAW;if(!RegisterClass(&wndclass)){MessageBox(NULL,TEXT("the program require the windows nt"),TEXT("tips"),MB_ICONERROR);return 0;}hwnd=CreateWindow( szAppName, // registered class name TEXT("this is title"), // window name WS_OVERLAPPEDWINDOW, // window style CW_USEDEFAULT, // horizontal position of window CW_USEDEFAULT, // vertical position of window CW_USEDEFAULT, // window width CW_USEDEFAULT, // window height NULL, // handle to parent or owner window NULL, // menu handle or child identifier hInstance, // handle to application instance NULL // window-creation data);ShowWindow(hwnd,nCmdShow);UpdateWindow(hwnd);while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return msg.wParam;}LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // message identifier WPARAM wParam, // first message parameter LPARAM lParam // second message parameter){HDC hdc;PAINTSTRUCT ps;static HWND hwndButton;static int i,ii;static int cxClient,cyClient;static int cxChar,cyChar;static HWND hwndList;static int count;static int iIndex,iLength;TCHAR szBuffer[20];static TCHAR szBuffer1[]=TEXT("hello");static TCHAR szBuffer2[]=TEXT("I love cplusplus");static TCHAR szBuffer3[]=TEXT("welcome to my blog");static TCHAR szBuffer4[]=TEXT("Let's begin to learn windows programing");static TCHAR szBuffer5[]=TEXT("After learning win32,we learn MFC");switch(uMsg){case WM_CREATE:cxChar=LOWORD(GetDialogBaseUnits()); cyChar=HIWORD(GetDialogBaseUnits()); hwndButton=CreateWindow( TEXT("BUTTON"),TEXT("按钮"),WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,0,0,0,0,hwnd,(HMENU)i,hInst,NULL);hwndList=CreateWindow(TEXT("listbox"),TEXT("please select"),WS_CHILD|WS_VISIBLE|LBS_STANDARD,cxChar,cyChar*3,cxChar*26+GetSystemMetrics(SM_CXVSCROLL),cyChar*5,hwnd,(HMENU)ii,hInst,NULL);SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer1);SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer2);SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer5);SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer4);SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer3);return 0;case WM_SIZE:cxClient=LOWORD(lParam);cyClient=GET_Y_LPARAM(lParam);MoveWindow(hwndButton,cxClient/2-cxChar*5,cyClient/2-cyChar*5,cxChar*10,cyChar*4,TRUE);return 0;case WM_COMMAND:if(wParam==i){MessageBox(NULL,TEXT("你点击了按钮"),TEXT("tips"),MB_OK);}if(LOWORD(wParam)==ii&&HIWORD(wParam)==LBN_SELCHANGE){iIndex=SendMessage(hwndList,LB_GETCURSEL,0,0);iLength=SendMessage(hwndList,LB_GETTEXTLEN,iIndex,0)+1;wsprintf(szBuffer,TEXT("你选择第%d 条,长度为 %d "),iIndex+1,iLength);MessageBox(NULL,szBuffer,TEXT("tips"),MB_ICONERROR);}return 0;case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hwnd,uMsg,wParam,lParam);}
顶住，再来一个：
#include <windows.h>#define ID_LIST 1#define ID_TEXT 2LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){ static TCHAR szAppName[] = TEXT ("Environ") ; HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, TEXT ("Environment List Box"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } return msg.wParam ;}void FillListBox (HWND hwndList) { int iLength ; TCHAR * pVarBlock, * pVarBeg, * pVarEnd, * pVarName ; pVarBlock = GetEnvironmentStrings () ; // Get pointer to environment block while (*pVarBlock) { if (*pVarBlock != '=') // Skip variable names beginning with '=' { pVarBeg = pVarBlock ; // Beginning of variable name while (*pVarBlock++ != '=') ; // Scan until '=' pVarEnd = pVarBlock - 1 ; // Points to '=' sign iLength = pVarEnd - pVarBeg ; // Length of variable name // Allocate memory for the variable name and terminating // zero. Copy the variable name and append a zero. pVarName = calloc (iLength + 1, sizeof (TCHAR)) ; CopyMemory (pVarName, pVarBeg, iLength * sizeof (TCHAR)) ; pVarName[iLength] = '\0' ; // Put the variable name in the list box and free memory. SendMessage (hwndList, LB_ADDSTRING, 0, (LPARAM) pVarName) ; free (pVarName) ; } while (*pVarBlock++ != '\0') ; // Scan until terminating zero } FreeEnvironmentStrings (pVarBlock) ;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){ static HWND hwndList, hwndText ; int iIndex, iLength, cxChar, cyChar ; TCHAR * pVarName, * pVarValue ; switch (message) { case WM_CREATE : cxChar = LOWORD (GetDialogBaseUnits ()) ; cyChar = HIWORD (GetDialogBaseUnits ()) ; // Create listbox and static text windows. hwndList = CreateWindow (TEXT ("listbox"), NULL, WS_CHILD | WS_VISIBLE | LBS_STANDARD, cxChar, cyChar * 3, cxChar * 16 + GetSystemMetrics (SM_CXVSCROLL), cyChar * 5, hwnd, (HMENU) ID_LIST, (HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE), NULL) ; hwndText = CreateWindow (TEXT ("static"), NULL, WS_CHILD | WS_VISIBLE | SS_LEFT, cxChar, cyChar, GetSystemMetrics (SM_CXSCREEN), cyChar, hwnd, (HMENU) ID_TEXT, (HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE), NULL) ; FillListBox (hwndList) ; return 0 ; case WM_SETFOCUS : SetFocus (hwndList) ; return 0 ; case WM_COMMAND : if (LOWORD (wParam) == ID_LIST && HIWORD (wParam) == LBN_SELCHANGE) { // Get current selection. iIndex = SendMessage (hwndList, LB_GETCURSEL, 0, 0) ; iLength = SendMessage (hwndList, LB_GETTEXTLEN, iIndex, 0) + 1 ; pVarName = calloc (iLength, sizeof (TCHAR)) ; SendMessage (hwndList, LB_GETTEXT, iIndex, (LPARAM) pVarName) ; // Get environment string. iLength = GetEnvironmentVariable (pVarName, NULL, 0) ; pVarValue = calloc (iLength, sizeof (TCHAR)) ; GetEnvironmentVariable (pVarName, pVarValue, iLength) ; // Show it in window. SetWindowText (hwndText, pVarValue) ; free (pVarName) ; free (pVarValue) ; } return 0 ; case WM_DESTROY : PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ;}