---
name: "GetRootCrd"
section: "3"
platform: "macos"
package: "tcl"
version: "152"
release: "macOS 26.5"
platforms: ["macos"]
url: "https://new.carta.tech/GetRootCrd/3"
---

# GetRootCrd(3)

Compute root-window coordinates of window

## NAME

Tk\_GetRootCoords - Compute root-window coordinates of window

## SYNOPSIS

```
#include <tk.h>

Tk_GetRootCoords(tkwin, xPtr, yPtr)
```

## ARGUMENTS

Token for window. Pointer to location in which to store root-window x-coordinate corresponding to left edge of *tkwin*'s border. Pointer to location in which to store root-window y-coordinate corresponding to top edge of *tkwin*'s border.

## DESCRIPTION

This procedure scans through the structural information maintained by Tk to compute the root-window coordinates corresponding to the upper-left corner of *tkwin*'s border.  If *tkwin* has no border, then **Tk\_GetRootCoords** returns the root-window coordinates corresponding to location (0,0) in *tkwin*. **Tk\_GetRootCoords** is relatively efficient, since it does not have to communicate with the X server.

## KEYWORDS

coordinates, root window