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Standard Dialog Data Validation Routines

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This topic lists the standard dialog data validation (DDV) routines used for common MFC dialog controls.

Note

The standard dialog data exchange routines are defined in the header file afxdd_.h. However, applications should include afxwin.h.

DDV Functions

Name Description
DDV_MaxChars Verifies the number of characters in a given control value does not exceed a given maximum.
DDV_MinMaxByte Verifies a given control value does not exceed a given BYTE range.
DDV_MinMaxDateTime Verifies a given control value does not exceed a given time range.
DDV_MinMaxDouble Verifies a given control value does not exceed a given double range.
DDV_MinMaxDWord Verifies a given control value does not exceed a given DWORD range.
DDV_MinMaxFloat Verifies a given control value does not exceed a given float range.
DDV_MinMaxInt Verifies a given control value does not exceed a given int range.
DDV_MinMaxLong Verifies a given control value does not exceed a given long range.
DDV_MinMaxLongLong Verifies a given control value does not exceed a given LONGLONG range.
DDV_MinMaxMonth Verifies a given control value does not exceed a given date range.
DDV_MinMaxShort Verifies a given control value does not exceed a given short range.
DDV_MinMaxSlider Verifies a given slider control value falls within the given range.
DDV_MinMaxUInt Verifies a given control value does not exceed a given UINT range.
DDV_MinMaxUnsigned Verifies a given control value falls between two specified values.
DDV_MinMaxULongLong Verifies a given control value does not exceed a given ULONGLONG range.

DDV_MaxChars

Call DDV_MaxChars to verify that the amount of characters in the control associated with value does not exceed nChars.

void AFXAPI DDV_MaxChars(
    CDataExchange* pDX,
    CString const& value,
    int nChars);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

nChars
Maximum number of characters allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxByte

Call DDV_MinMaxByte to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxByte(
    CDataExchange* pDX,
    BYTE value,
    BYTE minVal,
    BYTE maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type BYTE) allowed.

maxVal
Maximum value (of type BYTE) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxDateTime

Call DDV_MinMaxDateTime to verify that the time/date value in the date and time picker control ( CDateTimeCtrl) associated with refValue falls between refMinRange and refMaxRange.

void AFXAPI DDV_MinMaxDateTime(
    CDataExchange* pDX,
    CTime& refValue,
    const CTime* refMinRange,
    const CTime* refMaxRange);

void AFXAPI DDV_MinMaxDateTime(
    CDataExchange* pDX,
    COleDateTime& refValue,
    const COleDateTime* refMinRange,
    const COleDateTime* refMaxRange);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction. You don't need to delete this object.

refValue
A reference to a CTime or COleDateTime object associated with a member variable of the dialog box, form view, or control view object. This object contains the data to be validated.

refMinRange
Minimum date/time value allowed.

refMaxRange
Maximum date/time value allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxDouble

Call DDV_MinMaxDouble to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxDouble(
    CDataExchange* pDX,
    double const& value,
    double minVal,
    double maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type double) allowed.

maxVal
Maximum value (of type double) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxDWord

Call DDV_MinMaxDWord to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxDWord(
    CDataExchange* pDX,
    DWORD const& value,
    DWORD minVal,
    DWORD maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type DWORD) allowed.

maxVal
Maximum value (of type DWORD) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxFloat

Call DDV_MinMaxFloat to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxFloat(
    CDataExchange* pDX,
    float value,
    float minVal,
    float maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type float) allowed.

maxVal
Maximum value (of type float) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxInt

Call DDV_MinMaxInt to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxInt(
    CDataExchange* pDX,
    int value,
    int minVal,
    int maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type int) allowed.

maxVal
Maximum value (of type int) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxLong

Call DDV_MinMaxLong to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxLong(
    CDataExchange* pDX,
    long value,
    long minVal,
    long maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type long) allowed.

maxVal
Maximum value (of type long) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxLongLong

Call DDV_MinMaxLongLong to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxLongLong(
    CDataExchange* pDX,
    LONGLONG value,
    LONGLONG minVal,
    LONGLONG maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type LONGLONG) allowed.

maxVal
Maximum value (of type LONGLONG) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxMonth

Call DDV_MinMaxMonth to verify that the time/date value in the month calendar control ( CMonthCalCtrl) associated with refValue falls between refMinRange and refMaxRange.

void AFXAPI DDV_MinMaxMonth(
    CDataExchange* pDX,
    CTime& refValue,
    const CTime* refMinRange,
    const CTime* refMaxRange);

void AFXAPI DDV_MinMaxMonth(
    CDataExchange* pDX,
    COleDateTime& refValue,
    const COleDateTime* refMinRange,
    const COleDateTime* refMaxRange);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

refValue
A reference to an object of type CTime or COleDateTime associated with a member variable of the dialog box, form view, or control view object. This object contains the data to be validated. MFC passes this reference when DDV_MinMaxMonth is called.

refMinRange
Minimum date/time value allowed.

refMaxRange
Maximum date/time value allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxShort

Call DDV_MinMaxShort to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxShort(
    CDataExchange* pDX,
    short value,
    short minVal,
    short maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type short) allowed.

maxVal
Maximum value (of type short) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxSlider

Call DDV_MinMaxSlider to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxSlider(
    CDataExchange* pDX,
    DWORD value,
    DWORD minVal,
    DWORD maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to the value to be validated. This parameter holds or sets the slider control's current thumb position.

minVal
Minimum value allowed.

maxVal
Maximum value allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation. For information about slider controls, see Using CSliderCtrl.

Requirements

Header afxdd_.h

DDV_MinMaxUInt

Call DDV_MinMaxUInt to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxUInt(
    CDataExchange* pDX,
    UINT value,
    UINT minVal,
    UINT maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type UINT) allowed.

maxVal
Maximum value (of type UINT) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxULongLong

Call DDV_MinMaxULongLong to verify that the value in the control associated with value falls between minVal and maxVal.

void AFXAPI DDV_MinMaxULongLong(
    CDataExchange* pDX,
    ULONGLONG value,
    ULONGLONG  minVal ,
    ULONGLONG  maxVal);

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type ULONGLONG) allowed.

maxVal
Maximum value (of type ULONGLONG) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header afxdd_.h

DDV_MinMaxUnsigned

Call DDV_MinMaxUnsigned to verify that the value in the control associated with value falls between minVal and maxVal.

Syntax

   void AFXAPI DDV_MinMaxUnsigned(
       CDataExchange* pDX,
       unsigned value,
       unsigned minVal,
       unsigned maxVal );

Parameters

pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.

value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.

minVal
Minimum value (of type unsigned ) allowed.

maxVal
Maximum value (of type unsigned ) allowed.

Remarks

For more information about DDV, see Dialog Data Exchange and Validation.

Requirements

Header: afxdd_.h

See also

Standard Dialog Data Exchange Routines
Macros and Globals
DDX_Slider
DDX_FieldSlider