vc程序设计--对键盘与鼠标的响应(1)

// WindowsProject2.cpp : 定义应用程序的入口点。
//
/**
 * 当按下CTRL键时输出信息：CTRL键被压下
 * 当按下K键时输出信息：K键被压下
 * 当按下CTRL+K键时输出信息：CTRL+K键被压下
*/

#include "framework.h"
#include "WindowsProject2.h"

#define MAX_LOADSTRING 100
#define MAXLINE 1000   //最多行数
#define MAXNUMCHAR 10//一行中最多的字符

// 全局变量:
HINSTANCE hInst;                                // 当前实例
WCHAR szTitle[MAX_LOADSTRING];                  // 标题栏文本
WCHAR szWindowClass[MAX_LOADSTRING];            // 主窗口类名

// 此代码模块中包含的函数的前向声明:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
	_In_opt_ HINSTANCE hPrevInstance,
	_In_ LPWSTR    lpCmdLine,
	_In_ int       nCmdShow)
{
	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

	// TODO: 在此处放置代码。

	// 初始化全局字符串
	LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadStringW(hInstance, IDC_WINDOWSPROJECT2, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// 执行应用程序初始化:
	if (!InitInstance(hInstance, nCmdShow))
	{
		return FALSE;
	}

	HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WINDOWSPROJECT2));

	MSG msg;

	// 主消息循环:
	while (GetMessage(&msg, nullptr, 0, 0))
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return (int)msg.wParam;
}

//
//  函数: MyRegisterClass()
//
//  目标: 注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEXW wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WINDOWSPROJECT2));
	wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_WINDOWSPROJECT2);
	wcex.lpszClassName = szWindowClass;
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassExW(&wcex);
}

//
//   函数: InitInstance(HINSTANCE, int)
//
//   目标: 保存实例句柄并创建主窗口
//
//   注释:
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
	hInst = hInstance; // 将实例句柄存储在全局变量中

	HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

	if (!hWnd)
	{
		return FALSE;
	}

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	return TRUE;
}

//
//  函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  目标: 处理主窗口的消息。
//
//  WM_COMMAND  - 处理应用程序菜单
//  WM_PAINT    - 绘制主窗口
//  WM_DESTROY  - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId = LOWORD(wParam),
		wmEvent = HIWORD(wParam);
	PAINTSTRUCT ps;
	HDC hdc;
	LPTSTR dispInfo[4] = {L"CTRL键被压下",
L"K键被压下",L"CTRL+K键被压下",L"" };
	static int index = 3;
	COLORREF color[3] = { 0x00000000,0x00ff0000,0x000000ff };
	switch (message)
	{
	case WM_KEYDOWN:
		if (wmId == VK_CONTROL)
		{
			index = 0;
		}
		InvalidateRect(hWnd, NULL, true);
		break;
	case WM_CHAR:
		if (wmId == 'K' || wmId == 'k')	index = 1;
		else if (wmId == 'K' - 64) index = 2;
		//CRTL与字母键的组合的wParam的值为1-26，且与字母大小写无关
		else
			index = 3;
		InvalidateRect(hWnd, NULL, true);
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		SetTextColor(hdc, color[index]);		   		TextOut(hdc, 0, 0, dispInfo[index], _tcslen(dispInfo[index]));
		EndPaint(hWnd, &ps);
		break;

	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

	// “关于”框的消息处理程序。
	INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
	{
		UNREFERENCED_PARAMETER(lParam);
		switch (message)
		{
		case WM_INITDIALOG:
			return (INT_PTR)TRUE;

		case WM_COMMAND:
			if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
			{
				EndDialog(hDlg, LOWORD(wParam));
				return (INT_PTR)TRUE;
			}
			break;
		}
		return (INT_PTR)FALSE;
	}