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
1 #include<Windows.h>
2
3 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
4
5 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)
6 {
7 WNDCLASS WndClass;
8 TCHAR* ClassName = TEXT("MyClass");
9 HWND hwnd;
10 MSG msg;
11 HBRUSH hBrush;
12 hBrush = CreateSolidBrush(RGB(249,98,241));
13
14 WndClass.cbClsExtra = 0;
15 WndClass.cbWndExtra = 0;
16 WndClass.hbrBackground = hBrush;
17 WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
18 WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
19 WndClass.hInstance = hInst;
20 WndClass.lpfnWndProc = WindProc;
21 WndClass.lpszClassName = ClassName;
22 WndClass.lpszMenuName = NULL;
23 WndClass.style = CS_VREDRAW | CS_HREDRAW;
24
25 if (!RegisterClass(&WndClass))
26 {
27 MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK);
28 return 0;
29 }
30
31 hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 300, NULL, NULL, hInst, NULL);
32 if (hwnd == NULL)
33 {
34 MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK);
35 return 0;
36 }
37 ShowWindow(hwnd, nShow);
38 UpdateWindow(hwnd);
39
40 while (GetMessage(&msg, NULL, 0, 0))
41 {
42 TranslateMessage(&msg);
43 DispatchMessage(&msg);
44 }
45
46 return 0;
47 }
48
49 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
50 {
51 HDC hdc;
52 static int cx, cy;
53 static editHwnd, staticHwnd;
54 TCHAR str[1024];
55 int length;
56 switch (message)
57 {
58 case WM_CREATE:
59 editHwnd = CreateWindow(TEXT("edit"),NULL, WS_CHILD | WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_AUTOVSCROLL , 0, 0, 0, 0, hwnd, (HMENU)1, GetModuleHandle(NULL), NULL);
60 staticHwnd = CreateWindow(TEXT("static"), NULL, WS_CHILD | WS_VISIBLE|WS_BORDER, 0, 0, 0, 0, hwnd, (HMENU)2, GetModuleHandle(NULL), NULL);
61 return 0;
62 case WM_SIZE:
63 cx = LOWORD(lParam);
64 cy = HIWORD(lParam);
65 MoveWindow(editHwnd, 0, 0, cx/2, cy/2, TRUE);
66 MoveWindow(staticHwnd, cx / 2, cy / 2, cx, cy, TRUE);
67 return 0;
68 case WM_COMMAND:
69 if (HIWORD(wParam)==EN_CHANGE)
70 {
71 length = SendMessage(editHwnd, WM_GETTEXTLENGTH, NULL, NULL) + 1;
72 length = length > 1023 ? 1023 : length;
73 SendMessage(editHwnd, WM_GETTEXT, length, (LPARAM)str) ;
74 str[length] = ‘/0‘;
75 SetWindowText(staticHwnd,str);
76 }
77 return 0;
78 case WM_DESTROY:
79 PostQuitMessage(0);
80 return 0;
81 default:
82 break;
83 }
84
85 return DefWindowProc(hwnd, message, wParam, lParam);
86 }
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
1 #include<Windows.h>
2 #include<WinUser.h>
3 #include<tchar.h>
4 #include<stdio.h>
5
6 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
7
8 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)
9 {
10 WNDCLASS WndClass;
11 TCHAR* ClassName = TEXT("MyClass");
12 HWND hwnd;
13 MSG msg;
14
15 WndClass.cbClsExtra = 0;
16 WndClass.cbWndExtra = 0;
17 WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
18 WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
19 WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
20 WndClass.hInstance = hInst;
21 WndClass.lpfnWndProc = WindProc;
22 WndClass.lpszClassName = ClassName;
23 WndClass.lpszMenuName = NULL;
24 WndClass.style = CS_VREDRAW | CS_HREDRAW;
25
26 if (!RegisterClass(&WndClass))
27 {
28 MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK);
29 return 0;
30 }
31
32 //CreateWindow返回之前，会发送WM_CREATE消息
33 hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 300, NULL, NULL, hInst, NULL);
34 if (hwnd == NULL)
35 {
36 MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK);
37 return 0;
38 }
39 ShowWindow(hwnd, nShow);
40 UpdateWindow(hwnd);
41
42 while (GetMessage(&msg, NULL, 0, 0))
43 {
44 TranslateMessage(&msg);
45 DispatchMessage(&msg);
46 }
47
48 return 0;
49 }
50
51 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
52 {
53 PAINTSTRUCT pt;
54 HDC hdc;
55 static HWND ComboHwnd1, ComboHwnd2, ComboHwnd3,button,staticHwnd;
56 TCHAR str[1024];
57 switch (message)
58 {
59 case WM_CREATE:
60 ComboHwnd1 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_SIMPLE|CBS_AUTOHSCROLL|WS_VSCROLL, 0, 0, 0, 0, hwnd, (HMENU)1, GetModuleHandle(NULL), NULL);
61 ComboHwnd2 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_DROPDOWN, 0, 0, 0, 0, hwnd, (HMENU)2, GetModuleHandle(NULL), NULL);
62 ComboHwnd3 = CreateWindow(TEXT("ComboBox"), NULL, WS_CHILD | WS_VISIBLE | CBS_DROPDOWNLIST, 0, 0, 0, 0, hwnd, (HMENU)3, GetModuleHandle(NULL), NULL);
63 button = CreateWindow(TEXT("button"), TEXT("OK"), WS_CHILD | WS_VISIBLE , 0, 0, 0, 0, hwnd, (HMENU)4, GetModuleHandle(NULL), NULL);
64 staticHwnd= CreateWindow(TEXT("static"), NULL, WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, hwnd, (HMENU)5, GetModuleHandle(NULL), NULL);
65 return 0;
66 case WM_SIZE:
67 MoveWindow(ComboHwnd1, 0, 0, 100, 100, TRUE);
68 MoveWindow(ComboHwnd2, 150, 0, 100, 150, TRUE);
69 MoveWindow(ComboHwnd3, 300, 0, 100, 150, TRUE);
70 MoveWindow(button, 20, 120, 50, 25, TRUE);
71 MoveWindow(staticHwnd, 0, 150, 100, 100, TRUE);
72 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-1"));
73 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-2"));
74 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-3"));
75 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-4"));
76 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-5"));
77 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-6"));
78 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-7"));
79 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-8"));
80 SendMessage(ComboHwnd1, CB_ADDSTRING, NULL, (LPARAM)TEXT("char-9"));
81 return 0;
82 case WM_COMMAND:
83 if (HIWORD(wParam) == CBN_SELCHANGE)
84 {
85 GetWindowText(ComboHwnd1,str,50);
86 SetWindowText(staticHwnd,str);
87 }
88 return 0;
89 case WM_DESTROY:
90 PostQuitMessage(0);
91 return 0;
92 default:
93 break;
94 }
95
96 return DefWindowProc(hwnd, message, wParam, lParam);
97 }
运行结果：
原文地址：https://www.cnblogs.com/kelamoyujuzhen/p/9343731.html
时间： 2024-08-30 03:28:26