网站域名的密码搜索引擎大全入口

有的时候，用控制台同步输出调试信息、程序状态量，比出Log、弹出报错对话框等方法来得有效。那么如何做到呢？如下：

简而言之，用GetModuleHandle()函数获得当前程序实例句柄，其它地方与常见的Win32创建窗体方法相同。

看MSDN中这句：

If this parameter is NULL, GetModuleHandle returns a handle to the file used to create the calling process.

所以“GetModuleHandle(NULL)”返回的就是当前程序实例句柄。

 

 

#include <iostream>
#include <tchar.h>
#include <windows.h>#define MAX_STR 100// 全局变量:
HINSTANCE hInst;                                             // 当前实例
TCHAR szTitle[MAX_STR]       = _TEXT("Console_Win Demo");    // 标题栏文本
TCHAR szWindowClass[MAX_STR] = _TEXT("Console_Win Demo");    // 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 hInstance, int nCmdShow);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);int CreateMyWindow()
{std::cout << "Console_Win Demo" << std::endl << std::endl;std::cout << "================================" << std::endl << std::endl;HINSTANCE hInstance = NULL;int       nCmdShow  = SW_SHOW;      // 该变量取值参见MSDN
/*GetModuleHandle(NULL);这将返回自身应用程序句柄
*/hInstance = GetModuleHandle(NULL);std::cout << "hInstance: " << hInstance << std::endl;std::cout << "hInstance->unused: " << hInstance->unused << std::endl << std::endl;std::cout << "================================" << std::endl << std::endl;MSG msg;MyRegisterClass(hInstance);// 执行应用程序初始化:if (!InitInstance (hInstance, nCmdShow)) {std::cout << "Error in InitInstance()!" << std::endl;return FALSE;}// 主消息循环:while (GetMessage(&msg, NULL, 0, 0)) {TranslateMessage(&msg);DispatchMessage(&msg);}return (int) msg.wParam;
}//
//  函数: MyRegisterClass()
//
//  目的: 注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{WNDCLASSEX wcex;wcex.cbSize = sizeof(WNDCLASSEX);wcex.style          = CS_HREDRAW | CS_VREDRAW;wcex.lpfnWndProc    = (WNDPROC)WndProc;wcex.cbClsExtra     = 0;wcex.cbWndExtra     = 0;wcex.hInstance      = hInstance;wcex.hIcon          = NULL;wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);wcex.lpszMenuName   = NULL;wcex.lpszClassName  = szWindowClass;wcex.hIconSm        = NULL;return RegisterClassEx(&wcex);
}//
//   函数: InitInstance(HANDLE, int)
//
//   目的: 保存实例句柄并创建主窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{HWND hWnd;hInst = hInstance; // 将实例句柄存储在全局变量中
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);if (!hWnd){return FALSE;}ShowWindow(hWnd, nCmdShow);UpdateWindow(hWnd);return TRUE;
}//
//  函数: WndProc(HWND, unsigned, WORD, LONG)
//
//  目的: 处理主窗口的消息。
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{PAINTSTRUCT ps;HDC hdc;switch (message) {case WM_CREATE:std::cout << "Hello! I'm a CONSOLE. The WINDOW is my baby." << std::endl;break;case WM_COMMAND:break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);EndPaint(hWnd, &ps);break;case WM_DESTROY:PostQuitMessage(0);std::cout << "Goodbye!" << std::endl << std::endl;break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;
}