Hello everyone,

We read a lot of about writing Unicode ready program since Charles Petzold’s Programming Windows, 5th Edition. But how is a REAL Unicode string included in a c program and displayed correctly?

Below is the program from the book. It’s supposed it’s a Unicode ready program when it’s compiled with _UNICODE defined.

Now I want to insert two real Unicode characters 天大 into the string

TEXT ("Hello, Windows 98!").

I copy them from MS Character Map. Their Unicodes are U+5929 U+5927. The string now looks

TEXT ("Hello ??, Windows 98!")

or

TEXT ("Hello \x5929\x5927, Windows 98!")

in Visual Studio 2003. When it’s compiled and run, the string is displayed:


Hello??, Windows 98!

OR

HelloII, Windows 98!

The problem here is how one-byte ASCII characters and two-byte Unicodes are mixxed in to a TEXT(...) string and the compiler can correctly identify them, and do a properly translation into an internal Unicode string. The second issue is the default code page is Unicode UTF-16. This code page is used to dispaly the string. Is any body here know how MS VC team handle these issues?

So, how a REAL Unicode string is included and displayed correctly in a VC++ program?

Use BOM? Where is BOM put and how?

Can any body modify the following codes to make it displays correctly?



Thanks,

Code:
 
/*------------------------------------------------------------

   HELLOWIN.C -- Displays "Hello, Windows 98!" in client area

                 (c) Charles Petzold, 1998

  ------------------------------------------------------------*/

 

#include <windows.h>

 

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

 

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                    PSTR szCmdLine, int iCmdShow)

{

     static TCHAR szAppName[] = TEXT ("HelloWin") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;

     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;

     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }

     hwnd = CreateWindow (szAppName,                  // window class name
                          TEXT ("The Hello Program"), // window caption
                          WS_OVERLAPPEDWINDOW,        // window style
                          CW_USEDEFAULT,              // initial x position
                          CW_USEDEFAULT,              // initial y position
                          CW_USEDEFAULT,              // initial x size
                          CW_USEDEFAULT,              // initial y size
                          NULL,                       // parent window handle
                          NULL,                       // window menu handle
                          hInstance,                  // program instance handle
                          NULL) ;                     // creation parameters

     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;

     while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     HDC         hdc ;
     PAINTSTRUCT ps ;
     RECT        rect ;

     switch (message)
     {
     case WM_CREATE:
          PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
          return 0 ;

     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;

          GetClientRect (hwnd, &rect) ;

          DrawText (hdc, TEXT ("Hello\x5929\x5927, Windows 98!"), -1, &rect,
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;

          EndPaint (hwnd, &ps) ;
          return 0 ;

     case WM_DESTROY:
          PostQuitMessage (0) ;
          return 0 ;
     }

     return DefWindowProc (hwnd, message, wParam, lParam) ;
}