16 Windows编程——系统内置窗口子类型之edit、ComboBox、ownerbutton、listbox

edit类型的子窗口

ES_MULTILINE：多行输入文本框

窗口的消息：

WL_COMMAND：

EN_CHANGE：当edit窗口内的文本内容改变的时候，edit子窗口给父窗口发送一个WL_COMMAND消息，其通知码是EN_CHANGE。

WM_GETTEXT：

用SendMessage函数给edit窗口发送这个消息，同时，给wparam参数传递我们想要获得的字符个数，lParam传递一个内存块地址，sendMessage函数返回后，
lParam指向的内存中，将保存获得的字符。

WL_GETTEXTLENGTH：

用 SendMessage函数给edit窗口发送这个消息，将wParam和1Param都赋值为NULL，那SendMessage函数，将返回edit中的字符个数，但这个字符个数不包括NULL结尾字符。

edit空间演示源码

 #include<Windows.h>

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)
 {
     WNDCLASS WndClass;
     TCHAR* ClassName = TEXT("MyClass");
     HWND hwnd;
     MSG msg;
     HBRUSH hBrush;
     hBrush = CreateSolidBrush(RGB(,,));

     WndClass.cbClsExtra = ;
     WndClass.cbWndExtra = ;
     WndClass.hbrBackground = hBrush;
     WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
     WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     WndClass.hInstance = hInst;
     WndClass.lpfnWndProc = WindProc;
     WndClass.lpszClassName = ClassName;
     WndClass.lpszMenuName = NULL;
     WndClass.style = CS_VREDRAW | CS_HREDRAW;

     if (!RegisterClass(&WndClass))
     {
         MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK);
         return ;
     }

     hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, , , NULL, NULL, hInst, NULL);
     if (hwnd == NULL)
     {
         MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK);
         return ;
     }
     ShowWindow(hwnd, nShow);
     UpdateWindow(hwnd);

     while (GetMessage(&msg, NULL, , ))
     {
         TranslateMessage(&msg);
         DispatchMessage(&msg);
     }

     return ;
 }

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
     HDC hdc;
     static int cx, cy;
     static editHwnd, staticHwnd;
     TCHAR str[];
     int length;
     switch (message)
     {
     case WM_CREATE:
         editHwnd = CreateWindow(TEXT("edit"),NULL, WS_CHILD | WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_AUTOVSCROLL , , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         staticHwnd = CreateWindow(TEXT("static"), NULL, WS_CHILD | WS_VISIBLE|WS_BORDER, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         return ;
     case WM_SIZE:
         cx = LOWORD(lParam);
         cy = HIWORD(lParam);
         MoveWindow(editHwnd, , , cx/, cy/, TRUE);
         MoveWindow(staticHwnd, cx / , cy / , cx, cy, TRUE);
         return ;
     case WM_COMMAND:
         if (HIWORD(wParam)==EN_CHANGE)
         {
             length = SendMessage(editHwnd, WM_GETTEXTLENGTH, NULL, NULL) + ;
             length = length >  ?  : length;
             SendMessage(editHwnd, WM_GETTEXT, length, (LPARAM)str) ;
             str[length] = '/0';
             SetWindowText(staticHwnd,str);
         }
         return ;
     case WM_DESTROY:
         PostQuitMessage();
         return ;
     default:
         break;
     }

     return DefWindowProc(hwnd, message, wParam, lParam);
 }

运行结果

ComboBox类型的子窗口

ComboBox子窗口的三种主要子类型：

CB_ADDSTRING：在combobox控件的list框中，增加一个字符串，wParam=NULL，lParam符串的指针。

WL_COMMAND：

CBN_SELCHANGE：当combobox中的选项发生变化时，发送这个通知码，其中LOWORD（lParam）就是这个combobox的窗口标识ID。

CB_GETCURSEL：用SendMessage函数，发送这个消息给combobox子窗口，那么这个函数将返回被选中的列表项的索引（索引是从0开始的）。wParam=lParam=NULL.

演示代码

 #include<Windows.h>
 #include<WinUser.h>
 #include<tchar.h>
 #include<stdio.h>

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)
 {
     WNDCLASS WndClass;
     TCHAR* ClassName = TEXT("MyClass");
     HWND hwnd;
     MSG msg;

     WndClass.cbClsExtra = ;
     WndClass.cbWndExtra = ;
     WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + );
     WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
     WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     WndClass.hInstance = hInst;
     WndClass.lpfnWndProc = WindProc;
     WndClass.lpszClassName = ClassName;
     WndClass.lpszMenuName = NULL;
     WndClass.style = CS_VREDRAW | CS_HREDRAW;

     if (!RegisterClass(&WndClass))
     {
         MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK);
         return ;
     }

     //CreateWindow返回之前，会发送WM_CREATE消息
     hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, , , NULL, NULL, hInst, NULL);
     if (hwnd == NULL)
     {
         MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK);
         return ;
     }
     ShowWindow(hwnd, nShow);
     UpdateWindow(hwnd);

     while (GetMessage(&msg, NULL, , ))
     {
         TranslateMessage(&msg);
         DispatchMessage(&msg);
     }

     return ;
 }

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
     PAINTSTRUCT pt;
     HDC hdc;
     static HWND ComboHwnd1, ComboHwnd2, ComboHwnd3,button,staticHwnd;
     TCHAR str[];
     switch (message)
     {
     case WM_CREATE:
         ComboHwnd1 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_SIMPLE|CBS_AUTOHSCROLL|WS_VSCROLL, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         ComboHwnd2 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_DROPDOWN, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         ComboHwnd3 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_DROPDOWNLIST, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         button = CreateWindow(TEXT("button"), TEXT("OK"), WS_CHILD | WS_VISIBLE , , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         staticHwnd= CreateWindow(TEXT("static"), NULL, WS_CHILD | WS_VISIBLE, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         return ;
     case WM_SIZE:
         MoveWindow(ComboHwnd1, , , , , TRUE);
         MoveWindow(ComboHwnd2, , , , , TRUE);
         MoveWindow(ComboHwnd3, , , , , TRUE);
         MoveWindow(button, , , , , TRUE);
         MoveWindow(staticHwnd, , , , , TRUE);
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-1"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-2"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-3"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-4"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-5"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-6"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-7"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-8"));
         SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-9"));
         return ;
     case WM_COMMAND:
         if (HIWORD(wParam) == CBN_SELCHANGE)
         {
             GetWindowText(ComboHwnd1,str,);
             SetWindowText(staticHwnd,str);
         }
         return ;
     case WM_DESTROY:
         PostQuitMessage();
         return ;
     default:
         break;
     }

     return DefWindowProc(hwnd, message, wParam, lParam);
 }

运行结果：

 ownerbutton、listbox

演示代码

 #include<Windows.h>
 #include<WinUser.h>
 #include<tchar.h>
 #include<stdio.h>

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)
 {
     WNDCLASS WndClass;
     TCHAR* ClassName = TEXT("MyClass");
     HWND hwnd;
     MSG msg;
     HBRUSH hBrush;

     hBrush = CreateSolidBrush(RGB(, , ));

     WndClass.cbClsExtra = ;
     WndClass.cbWndExtra = ;
     WndClass.hbrBackground = hBrush;
     WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
     WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     WndClass.hInstance = hInst;
     WndClass.lpfnWndProc = WindProc;
     WndClass.lpszClassName = ClassName;
     WndClass.lpszMenuName = NULL;
     WndClass.style = CS_VREDRAW | CS_HREDRAW;

     if (!RegisterClass(&WndClass))
     {
         MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK);
         return ;
     }

     //CreateWindow返回之前，会发送WM_CREATE消息
     hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, , , NULL, NULL, hInst, NULL);
     if (hwnd == NULL)
     {
         MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK);
         return ;
     }
     ShowWindow(hwnd, nShow);
     UpdateWindow(hwnd);

     while (GetMessage(&msg, NULL, , ))
     {
         TranslateMessage(&msg);
         DispatchMessage(&msg);
     }

     return ;
 }

 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
     static int cx, cy;
     static HWND ownerbutton,scroll,listbox;
     int index;
     TCHAR str[];
     RECT rect;
     switch (message)
     {
     case WM_CREATE:
         //创建普通button
         //ownerbutton = CreateWindow(TEXT("button"), TEXT("OK"), WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, hwnd, (HMENU)1, GetModuleHandle(NULL), NULL);
         //创建ownerbutton
         ownerbutton = CreateWindow(TEXT("button"), TEXT("OK"), WS_CHILD | WS_VISIBLE|BS_OWNERDRAW, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         scroll = CreateWindow(TEXT("ScrollBar"), NULL, WS_CHILD | WS_VISIBLE|SBS_VERT , , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         listbox = CreateWindow(TEXT("listbox"), NULL, WS_CHILD | WS_VISIBLE |LBS_STANDARD, , , , , hwnd, (HMENU), GetModuleHandle(NULL), NULL);
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-1"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-2"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-3"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-4"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-5"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-6"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-7"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-8"));
         SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)TEXT("char-9"));
         return ;
     case WM_SIZE:
         cx = LOWORD(lParam);
         cy = HIWORD(lParam);
         MoveWindow(ownerbutton, , , , , TRUE);
         MoveWindow(scroll, cx-, , , cy, TRUE);
         MoveWindow(listbox, , , , , TRUE);
         return ;
     case WM_PAINT:
         return ;
     case WM_DRAWITEM:
         SetTextColor(((DRAWITEMSTRUCT*)lParam)->hDC, RGB(, , ));
         TextOut(((DRAWITEMSTRUCT*)lParam)->hDC,,, TEXT("确定"),);
         return ;
     case WM_CTLCOLORBTN:
         GetWindowRect(ownerbutton, &rect);
         SetBkMode((HDC)wParam,TRANSPARENT);
         SelectObject((HDC)wParam, CreateSolidBrush(RGB(, , )));
         Rectangle((HDC)wParam,,,rect.right-rect.left,rect.bottom-rect.top);
         return (LRESULT)CreateSolidBrush(RGB(, , ));
     case WM_VSCROLL:
         //处理方法参考之前滚动条处理方法
         return ;
     case WM_COMMAND:
         index = SendMessage(listbox, LB_GETCURSEL, NULL,NULL);
         SendMessage(listbox, LB_GETTEXT, index, (LPARAM)str);
         return ;
     case WM_DESTROY:
         PostQuitMessage();
         return ;
     default:
         break;
     }

     return DefWindowProc(hwnd, message, wParam, lParam);
 }