---
name: "XmDirectionMatchPartial"
section: "3"
platform: "linux"
package: "openmotif"
version: "2.3.8-4"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/XmDirectionMatchPartial"
---

# XmDirectionMatchPartial(3)

A function that checks for a specified direction component

## NAME

**XmDirectionMatchPartial** — A function that checks for a specified direction component

## SYNOPSIS

```
#include <Xm/Xm.h>
Boolean XmDirectionMatchPartial (d1, d2, dmask)
        XmDirection     d1;
        XmDirection     d2;
        XmDirection     dmask;
(void)
```

## DESCRIPTION

**XmDirectionMatchPartial** compares *d1* and *d2* along the direction component specified by *dmask*. For example, if *dmask* equals **XmVERTICAL\_MASK**, then the function will compare only the vertical components of *d1* and *d2*.

- *d1*

  Specifies an **XmDirection** value to check.

- *d2*

  Specifies an **XmDirection** value to check.

- *dmask*

  Specifies the direction component along which *d1* and *d2* are to be checked. Appropriate values for *dmask* are **XmHORIZONTAL\_MASK**, **XmVERTICAL\_MASK**, and **XmPRECEDENCE\_MASK**.

## RETURN VALUES

Returns True if the *d1* and *d2* match in the component specified by *dmask*; otherwise, returns False.

## RELATED INFORMATION

[**XmDirection**(3)](/XmDirection/3.md), [**XmDirectionMatch**(3)](/XmDirectionMatch/3.md), [**XmDirectionToStringDirection**(3)](/XmDirectionToStringDirection/3.md), [**XmStringDirection**(3)](/XmStringDirection/3.md), and [**XmStringDirectionToDirection**(3)](/XmStringDirectionToDirection/3.md).