---
name: "DosDateTimeToVariantTime"
section: "3w"
platform: "linux"
package: "libwine-dev"
version: "1.4.1-4"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/DosDateTimeToVariantTime"
---

# DosDateTimeToVariantTime(3w)

## NAME

**DosDateTimeToVariantTime** (OLEAUT32.14)

## SYNOPSIS

INT DosDateTimeToVariantTime\
  (\
   USHORT  *wDosDate*,\
   USHORT  *wDosTime*,\
   double\* *pDateOut*\
  )

## DESCRIPTION

Convert a Dos format date and time into variant **VT\_DATE** format.

## PARAMS

*wDosDate* **\[In\]**  Dos format date.

*wDosTime* **\[In\]**  Dos format time.

*pDateOut* **\[Out\]**  Destination for **VT\_DATE** format.

## RETURNS

**Success:** **TRUE**. *pDateOut* contains the converted time.

**Failure:** **FALSE**, if *wDosDate* or *wDosTime* are invalid (see notes).

## NOTES

**-** Dos format dates can only hold dates from **1**-Jan-**1980** to **31**-Dec-**2099.**

**-** Dos format times are accurate to only **2** second precision.

**-** The format of a Dos Date is: \
\
  Bits   Values  Meaning\
\
  \----   ------  -------\
\
  0-4    1-31    Day of the week. 0 rolls back one day. A value greater than\
\
                 the days in the month rolls forward the extra days.\
\
  5-8    1-12    Month of the year. 0 rolls back to December of the previous\
\
                 year. 13-15 are invalid.\
\
  9-15   0-119   Year based from 1980 (Max 2099). 120-127 are invalid.

**-** The format of a Dos Time is: \
\
  Bits   Values  Meaning\
\
  \----   ------  -------\
\
  0-4    0-29    Seconds/2. 30 and 31 are invalid.\
\
  5-10   0-59    Minutes. 60-63 are invalid.\
\
  11-15  0-23    Hours (24 hour clock). 24-32 are invalid.

## IMPLEMENTATION

Declared in **"oleauto.h"**.

Implemented in **"dlls/oleaut32/variant.c"**.

Debug channel **"variant"**.