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GetDlgItemInt info  Overview  Group

The GetDlgItemInt function translates the text of a specified control in a dialog box into an integer value.

UINT GetDlgItemInt(

    HWND hDlg,

// handle to dialog box

    int nIDDlgItem,

// control identifier

    BOOL *lpTranslated,

// points to variable to receive success/failure indicator

    BOOL bSigned 

// specifies whether value is signed or unsigned

   );

Parameters

hDlg
Handle to the dialog box that contains the control of interest.
nIDDlgItem
Dialog item identifier that specifies the control whose text is to be translated.
lpTranslated
Points to a Boolean variable that receives a function success/failure value. TRUE indicates success, FALSE indicates failure.

This parameter is optional: it can be NULL. In that case, the function returns no information about success or failure.

bSigned
Specifies whether the function should examine the text for a minus sign at the beginning and return a signed integer value if it finds one. TRUE specifies that this should be done, FALSE that it should not.

Return Values

If the function succeeds, the variable pointed to by lpTranslated is set to TRUE, and the return value is the translated value of the control text.

If the function fails, the variable pointed to by lpTranslated is set to FALSE, and the return value is zero. Note that, since zero is a possible translated value, a return value of zero does not by itself indicate failure.

If lpTranslated is NULL, the function returns no information about success or failure.

If the bSigned parameter is TRUE, specifying that the value to be retrieved is a signed integer value, cast the return value to an int type. To get extended error information, call GetLastError.

Remarks

The GetDlgItemInt function retrieves the text of the given control by sending the control a WM_GETTEXT message. The function translates the retrieved text by stripping any extra spaces at the beginning of the text and then converting the decimal digits. The function stops translating when it reaches the end of the text or encounters a nonnumeric character.

If the bSigned parameter is TRUE, the GetDlgItemInt function checks for a minus sign (-) at the beginning of the text and translates the text into a signed integer value. Otherwise, the function creates an unsigned integer value.

The GetDlgItemInt function returns zero if the translated value is greater than INT_MAX (for signed numbers) or UINT_MAX (for unsigned numbers).

See Also

GetDlgCtrlID, GetDlgItem, GetDlgItemText, SetDlgItemInt

 


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