C / C++ / MFC

    CDC m_dc,m_dc2;
    
    m_dc.CreateCompatibleDC(GetDC());
    m_dc2.CreateCompatibleDC(GetDC());

    HBITMAP hbit=CreateCompatibleBitmap(GetDC()->m_hDC,800,600);
    HBITMAP hbit2=CreateCompatibleBitmap(GetDC()->m_hDC,800,600);
    hbit=(HBITMAP)m_dc.SelectObject(hbit);
    <font color="Red">// hbit is m_dc's original bitmap
    // m_dc has compatible bitmap 1</font>
    hbit2=(HBITMAP)m_dc2.SelectObject(hbit2);
    <font color="Red">// hbit2 is m_dc2's original bitmap
    // m_dc2 has compatible bitmap 2</font>

    hbit=(HBITMAP)LoadImage(NULL, _T("e:\\8bit.bmp"), IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    <font color="Red">// hbit is loaded bitmap (m_dc's original bitmap is lost)</font>
    hbit=(HBITMAP)m_dc.SelectObject(hbit);
    <font color="Red">// hbit is compatible bitmap 1
    // m_dc has loaded bitmap</font>
    m_dc.TextOut(0,0,_T("And is this your answer"),23);

    m_dc2.BitBlt(300,300,200,200,&m_dc,0,0,SRCCOPY);
    hbit2=(HBITMAP)m_dc2.SelectObject(hbit);
    <font color="Red">// hbit2 is compatible bitmap 2 (m_dc2's original bitmap is lost)
    // m_dc2 has compatible bitmap 1</font>

    CImage m_Image;
    m_Image.Attach(hbit2);
    m_Image.Save(_T("e:\\8bit_test.bmp"));
    m_Image.Destroy();
    <font color="Red">// compatible bitmap 2 destroyed</font>
    m_dc.DeleteDC();
    m_dc2.DeleteDC();
    DeleteObject(hbit);
    <font color="Red">// compatible bitmap 1 destroyed</font>
    DeleteObject(hbit2);
    <font color="Red">// hbit2 was already destroyed above so this line was useless</font>

    <font color="Red">// loaded bitmap is lost - leak</font>

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

What thread are you creating the dialog on?
What thread do you do the continuous checking on?

Mark Salsbery
Microsoft MVP - Visual C++

narayanagvs wrote:

Iam trying to open it Programmatically using DOS command "cmd /c start myfile.pdf".

prithaa wrote:

CurrentDatabase.ExecuteSQL("Create Table Purchase (Amt decimal(10,2))");

CurrentDatabase.ExecuteSQL("Create Table Purchase (Amt decimal(10))");

CurrentDatabase.ExecuteSQL("Create Table Purchase (Amt decimal)");

prithaa wrote:

I checked the SQL Create command which says decimal(10,2) for decimal values.

prithaa wrote:

What should I do for decimal vlues?

CurrentDatabase.ExecuteSQL("Create Table Purchase (Amt double)");

enum my_field_sizes { REC_NSIZE=32, REC_IDSIZE=10, REC_PWSIZE=12};
typedef struct my_record
{
    char name[REC_NSIZE], id[REC_IDSIZE], pw[REC_PWSIZE];
} MY_RECORD;

const char* My_ReadField(const char* pStr, char* pOut, unsigned nOutSize)
{
    /* validate arguments */
    if( pStr && *pStr && pOut && nOutSize )
    {
        int i;
        /* skip any leading white space */
        while( isspace(*pStr) )
            ++pStr;
         /* read until a space is found, or pOut is full, or end of pStr is reached */
        for( i=0; i < nOutSize && !isspace(*pStr) && *pStr; ++i, ++pStr )
            pOut[i] = *pStr;
        i = (i < nOutSize) ? i : (nOutSize-1); /* safety first ;-) */
        pOut[i] = ‘\0’; /* end of string */
        /* make sure we have reached the delimiter (space) before returning */
        while( !isspace(*pStr) && *pStr )
            ++pStr;
    }
    return(pStr); /* pointer to next read position, end of pStr, or NULL */
}

void My_ReadRecordLine(MY_RECORD* pRec, const char* pLine)
{
    const char* pNextField = pLine;
    memset(pRec, 0, sizeof(MY_RECORD)); /* clear record first */
    pNextField = My_ReadField(pNextField, pRec->name, REC_NSIZE);
    pNextField = My_ReadField(pNextField, pRec->id, REC_IDSIZE);
    My_ReadField(pNextField, pRec->pw, REC_PWSIZE);
}

char test [] = "iain 1234 clarke"; // test string
char password [256]; // leave plenty of room
int id;

while (GetThingsFromLine (test, &id, password))
{
   DoStuff (id, password);
}

BOOL GetThingsFromLine (char *test, int *id, char *password)
{
   char name [256]; // we need to store it briefly
   return sscanf (test, "%s %i %s", name, id, password) != 0;
}