一个对话框模板资源创建一个无模式的对话框

CreateDialog()函数
函数功能：CreateDialog宏从一个对话框模板资源创建一个无模式的对话框，CreateDiaog宏使用CreateDialogParam函数。

函数原型：HWND CreateDialog（HINSTANCE hlnstance，LPCTSTR lpTemplate，HWND hWndParent，DLGPROC IpDialogFunc）；

1. 新建一个windows空项目
2. 添加一个main.cpp
3. 添加一个dialog资源文件

#include <windows.h>
#include "resource.h"

INT_PTR CALLBACK dlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_CLOSE:
		PostQuitMessage(0);
		break;
	case WM_COMMAND:
	{
		if (LOWORD(wParam) == IDOK)
		{
			TCHAR szUser[256] = { 0 };
			GetDlgItemText(hwnd, IDC_EDIT_USER, szUser, 256);
			
			TCHAR szPwd[256] = { 0 };
			GetDlgItemText(hwnd, IDC_EDIT_PWD, szPwd, 256);

			if (wcscmp(szUser, szPwd) == 0)
			{
				MessageBox(GetParent(hwnd), L"登录成功", L"提示", MB_OK);
			}
			else
			{
				MessageBox(GetParent(hwnd), L"帐号或密码错误", L"提示", MB_OK);
			}
		}
	}
	break;
	default:
		return FALSE;  //消息未处理交给windows默认处理程序处理
	}
	return TRUE;   //消息已经被处理
}

int __stdcall WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
	HWND hwnd = CreateDialog(hInstance, MAKEINTRESOURCE(IDD_DIALOG), NULL, dlgProc);
	ShowWindow(hwnd, SW_SHOW);

	MSG msg;
	while (GetMessage(&msg, 0, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return 0;
}

C++使用Win32接口,打开文件对话框选文件。

/***************************************************************************
*IDE:VS2019
*Language:C/C++
*Project:Windows打开文件对话框
*Author:Raise
*DateTime:2020/6/26 15:53
*Note:代码是以前得应该是17年18年的。
****************************************************************************/
#include <iostream>
#include <windows.h>  
#include <commdlg.h>  

int main()
{
	OPENFILENAME ofn;      // 公共对话框结构。     
	TCHAR szFile[MAX_PATH]; // 保存获取文件名称的缓冲区。               
	// 初始化选择文件对话框。     
	ZeroMemory(&ofn, sizeof(OPENFILENAME));
	ofn.lStructSize = sizeof(OPENFILENAME);
	ofn.hwndOwner = NULL;
	ofn.lpstrFile = szFile;
	ofn.lpstrFile[0] = '\0';
	ofn.nMaxFile = sizeof(szFile);
	ofn.lpstrFilter = L"All(*.*)\0*.*\0Text(*.txt)\0*.txt\0JPG(*.jpg)\0*.jpg";//(LPCWSTR)"All(*.*)\0*.*\0Text(*.txt)\0*.TXT\0\0";
	ofn.nFilterIndex = 1;
	ofn.lpstrFileTitle = NULL;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = NULL;
	ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
	//ofn.lpTemplateName =  MAKEINTRESOURCE(ID_TEMP_DIALOG);    
	// 显示打开选择文件对话框。
	if (GetOpenFileName(&ofn))
	{
		//显示选择的文件。 
		std::wcout << szFile << std::endl;
		//OutputDebugString(szFile);    //这一句是显示路径吗？为什么不显示？
		//OutputDebugString((LPCWSTR)"\r\n");
	}
	system("pause");
	return 0;
}

BOOL OpenFileDialog(const TCHAR* szTitle, HWND hWnd, TCHAR *szFullName, int fullNameLength,TCHAR* szFileName,int fileNameLength,TCHAR* szFilter)
	{
		OPENFILENAME ofn;
		ZeroMemory(&ofn, sizeof(ofn));

		ofn.lStructSize = sizeof(ofn);
		ofn.hwndOwner = hWnd;

		ofn.lpstrTitle = szTitle;//对话框标题

		ofn.lpstrFile = szFullName;//包含了全路径的文件名缓冲区
		ofn.nMaxFile = sizeof(TCHAR)*fullNameLength;
		// Set lpstrFile[0] to '\0' so that GetOpenFileName does not 
		// use the contents of szFile to initialize itself.
		if ((szFullName != NULL) && (fullNameLength > 0))
			ofn.lpstrFile[0] = _T('\0');

		ofn.lpstrFileTitle = szFileName;//不包含全路径的文件名缓冲区
		ofn.nMaxFileTitle = sizeof(TCHAR)*fileNameLength;
		if ((szFileName != NULL) && (fileNameLength > 0))
			ofn.lpstrFileTitle[0] = _T('\0');
		
		ofn.lpstrFilter = szFilter;//例如：_T("音乐文件(*.mp3)\0*.mp3\0所有文件(*.*)\0*.*\0\0");
		//ofn.nFilterIndex = 1;
		ofn.lpstrInitialDir = NULL;
		ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

		return GetOpenFileName(&ofn);
	}

	BOOL SaveFileDialog(const TCHAR* szTitle, HWND hWnd, TCHAR *szFullName, int fullNameLength, TCHAR* szFileName, int fileNameLength, TCHAR* szFilter)
	{
		OPENFILENAME ofn;
		ZeroMemory(&ofn, sizeof(ofn));
		ofn.lStructSize = sizeof(ofn);
		ofn.hwndOwner = hWnd;
		ofn.lpstrTitle = szTitle;//对话框标题

		ofn.lpstrFile = szFullName;//包含了全路径的文件名缓冲区
		ofn.nMaxFile = sizeof(TCHAR)*fullNameLength;
		// Set lpstrFile[0] to '\0' so that GetOpenFileName does not 
		// use the contents of szFile to initialize itself.
		if ((szFullName != NULL) && (fullNameLength > 0))
			ofn.lpstrFile[0] = _T('\0');

		ofn.lpstrFileTitle = szFileName;//不包含全路径的文件名缓冲区
		ofn.nMaxFileTitle = sizeof(TCHAR)*fileNameLength;
		if ((szFileName != NULL) && (fileNameLength > 0))
			ofn.lpstrFileTitle[0] = _T('\0');
		ofn.lpstrFilter = szFilter;//例如：_T("音乐文件(*.mp3)\0*.mp3\0所有文件(*.*)\0*.*\0\0");
		ofn.lpstrDefExt = _T("");
		ofn.lpstrInitialDir = NULL;
		ofn.Flags = OFN_OVERWRITEPROMPT;
		return GetSaveFileName(&ofn);
	}

bool OpenDirectory(HWND hwnd, TCHAR* szTitle, TCHAR* recvBuf)
{
	BROWSEINFO bi = { 0 };
	bi.hwndOwner = hwnd;
	bi.lpszTitle = szTitle;
	LPITEMIDLIST lpidlBrowse = SHBrowseForFolder(&bi);
	if (lpidlBrowse)
	{
		if (::SHGetPathFromIDList(lpidlBrowse, recvBuf))
		{
			::CoTaskMemFree(lpidlBrowse);
			return true;
		}
		else
		{
			::CoTaskMemFree(lpidlBrowse);
			return false;// 选择了计算机
		}
	}
	return false;
}