C / C++ / MFC

Quote:

how is that possibble, i mean you must go through all the elements..

    case WM_PAINT :
    {
      PAINTSTRUCT paint ;
      HDC hdc = BeginPaint( hwnd , &paint ) ;
      RECT rect ;
      GetClientRect( hwnd , &rect ) ;
      winx = rect.right ;
      winy = rect.bottom ;
/*
      HPEN pen = CreatePen( PS_SOLID ,
        1 , RGB( 255 , 255 , 0 ) ) ;
      HBRUSH brush =
        CreateSolidBrush( RGB( 255 , 255 , 0 ) ) ;
*/
      Ellipse( hdc ,
               playerx - 20 ,
               playery - 20 ,
               playerx + 20 ,
               playery + 20 ) ;
 
      EndPaint( hwnd , &paint ) ;
    }
    break ;

// bluatigro 23 okt 2017
// win game 1

#if defined(UNICODE) && !defined(_UNICODE)
    #define _UNICODE
#elif defined(_UNICODE) && !defined(UNICODE)
    #define UNICODE
#endif

#include <tchar.h>
#include <windows.h>

bool key[ 256 ] ;
int playerx , playery , winx , winy ;
#define FRAME_TIMER 1

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp");

int WINAPI WinMain (HINSTANCE hThisInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR lpszArgument,
                     int nCmdShow)
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default colour as the background of the window */
    wincl.hbrBackground = (HBRUSH)BLACK_BRUSH;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           _T("Game 1"),       /* Title Text */
           WS_OVERLAPPEDWINDOW | WS_MAXIMIZE , /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           800,                 /* The programs width */
           600,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nCmdShow);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd,
  UINT message, WPARAM wParam, LPARAM lParam)
{
  PAINTSTRUCT paint ;
  HDC hdc = BeginPaint( hwnd , &paint ) ;
  RECT rect ;
  HBRUSH brush =
    CreateSolidBrush( RGB(255,255,0) ) ;
  HPEN pen =
    CreatePen( PS_SOLID ,
               0 ,
               RGB(255,255,0) ) ;
  switch (message)                  /* handle the messages */
  {
    case WM_CREATE :
      playerx = 100 ;
      playery = 100 ;
      SetTimer( hwnd
      , FRAME_TIMER
      , 40 , NULL ) ;
      break ;
    case WM_KEYDOWN :
      key[ wParam ] = true ;
      switch( wParam )
      {
        case VK_ESCAPE :
          PostQuitMessage( 0 ) ;
          break ;
        default : ;
      }
      break ;
    case WM_KEYUP :
      key[ wParam ] = false ;
      break ;
    case WM_TIMER :
      switch( wParam )
      {
        case FRAME_TIMER :
          if ( key[ VK_UP ] ) playery-- ;
          if ( key[ VK_DOWN ] ) playery++ ;
          if ( key[ VK_LEFT ] ) playerx-- ;
          if ( key[ VK_RIGHT ] ) playerx++ ;

          if ( playery > winy ) playery = 0 ;
          if ( playery < 0 ) playery = winy ;
          if ( playerx > winx ) playerx = 0 ;
          if ( playerx < 0 ) playerx = winx ;
          InvalidateRect( hwnd , NULL , true ) ;
        break ;
        default : ;
      }
      break ;
    case WM_PAINT :
      GetClientRect( hwnd , &rect ) ;
      winx = rect.right ;
      winy = rect.bottom ;

      Ellipse( hdc ,
               playerx - 20 ,
               playery - 20 ,
               playerx + 20 ,
               playery + 20 ) ;

      EndPaint( hwnd , &paint ) ;
      break ;
    case WM_DESTROY :
      PostQuitMessage( 0 ) ;       /* send a WM_QUIT to the message queue */
      break ;
    default :                      /* for messages that we don't deal with */
      return DefWindowProc (hwnd, message, wParam, lParam);
  }

  return 0 ;
}

CString CMyDoc::FormatData(CDBVariant* pDBVariant)
{
	CString sRet;

	switch(pDBVariant->m_dwType)
	{
	case DBVT_LONG:
		TRACE("DBVT_LONG\n");
		sRet.Format(_T("%d"), pDBVariant->m_lVal);
		break;
	case DBVT_DOUBLE:
		TRACE("DBVT_DOUBLE\n");
		break;
	case DBVT_SHORT:
		TRACE("DBVT_SHORT\n");
		break;
	case DBVT_SINGLE:
		TRACE("DBVT_SINGLE\n");
		break;
	case DBVT_STRING:
		TRACE("DBVT_STRING\n");
		break;
	case DBVT_ASTRING:
		TRACE("DBVT_ASTRING\n");
		sRet = *pDBVariant->m_pstring;
		break;
	case DBVT_DATE:
		TRACE("DBVT_DATE\n");
		break;
	case DBVT_WSTRING:
		TRACE("DBVT_WSTRING\n");
		CStringW wstring = *pDBVariant->m_pstringW;
		sRet = CString(wstring);
		break;
	}

	return sRet;
}

SELECT nUser FROM my_table

SELECT dValue FROM my_table

SELECT sName FROM my_table

Flaviu2 wrote:

dVAT has decimal (10.2) SQL data type, and when I test this data with CMyDoc::FormatData, the returning data type are: DBVT_ASTRING ... why ?