API | MFC | C++ | C |
Programming Windows API

File Open Save Common Dialog Box Example


//open save common dialog box

#include <windows.h>

#define ID_BUTTON 1

#define ID_BUTTON1 2

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

void LoadFile(LPSTR );

void OpenDialog(HWND );

void SaveDialog(HWND );

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,PWSTR pCmdLine, int nCmdShow) 

{

MSG  msg ;    

WNDCLASS wc = {0};

wc.lpszClassName = TEXT("File open save dialog box");

wc.hInstance     = hInstance;

wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);

wc.lpfnWndProc   = WndProc;



RegisterClass(&wc);

CreateWindow( wc.lpszClassName, TEXT("File open/save dialog box"),WS_OVERLAPPEDWINDOW | WS_VISIBLE,150, 150, 250, 200, 0, 0, hInstance, 0);  

while( GetMessage(&msg, NULL, 0, 0)) 

{

DispatchMessage(&msg);

}



return (int) msg.wParam;

}



LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {



switch(msg) {



case WM_CREATE:

{

CreateWindow(TEXT("button"), TEXT("File Open"),WS_VISIBLE | WS_CHILD ,20, 30, 80, 25,hwnd, (HMENU) ID_BUTTON, NULL, NULL);

CreateWindow(TEXT("button"), TEXT("File save"),WS_VISIBLE | WS_CHILD ,120, 30, 80, 25,hwnd, (HMENU) ID_BUTTON1, NULL, NULL);

break;

}



case WM_COMMAND:

{

if (HIWORD(wParam) == BN_CLICKED) 

{

switch (LOWORD(wParam)) 

{

case ID_BUTTON:

OpenDialog(hwnd);

break;

case ID_BUTTON1:

SaveDialog(hwnd);

break;

}

}

break;

}



case WM_DESTROY:

{

PostQuitMessage(0);

break;

}

}



return DefWindowProc(hwnd, msg, wParam, lParam);

}

//fill file open structure and open common dialog box

void OpenDialog(HWND hwnd) {

OPENFILENAME ofn = { 0 };       // common dialog box structure

TCHAR szFileName[MAX_PATH];       // buffer for file name 

// Initialize OPENFILENAME

ZeroMemory(&ofn, sizeof(ofn));

ofn.lStructSize = sizeof(ofn);

ofn.hwndOwner = hwnd;

ofn.lpstrFile = szFileName;

ofn.lpstrFile[0] = '\0';

ofn.nMaxFile = sizeof(szFileName);

ofn.lpstrFilter = TEXT("All\0*.*\0Text\0*.TXT\0");

ofn.nFilterIndex = 1;

ofn.lpstrFileTitle = NULL;

ofn.nMaxFileTitle = 0;

ofn.lpstrInitialDir = NULL;

ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

// Display the Open dialog box. 

if (GetOpenFileName(&ofn)) 

{

HANDLE hFile;           

hFile = CreateFile(szFileName,GENERIC_READ,0,(LPSECURITY_ATTRIBUTES) NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,(HANDLE) NULL);

CloseHandle(hFile);

}

}



//fill file open structure and save common dialog box

void SaveDialog(HWND hwnd) {

OPENFILENAME ofn = { 0 }; // common dialog box structure

TCHAR szFileName[MAX_PATH];//// buffer for file name 

// Initialize OPENFILENAME

ZeroMemory(&ofn, sizeof(ofn));

ofn.lStructSize= sizeof(ofn);

ofn.hwndOwner = hwnd;

ofn.lpstrFilter = TEXT("Text Files (*.txt)\0*txt\0All Files (*.*)\0*.*\0");

ofn.lpstrFile = szFileName;

ofn.lpstrFile[0] = TEXT('\0');

ofn.nMaxFile = MAX_PATH;

ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY |OFN_OVERWRITEPROMPT;

ofn.lpstrDefExt = TEXT("txt");

// Display the Save dialog box.

if(GetSaveFileName(&ofn))

{

HANDLE hFile;

hFile=CreateFile(szFileName, GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ, NULL, OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL, NULL );

DWORD dwByteCount;

WriteFile( hFile, TEXT("Common dilog demo"), 17, &dwByteCount, NULL );

CloseHandle(hFile);

}

}