09-24-2012
Functions have their own parameters, $2 is something local to the function when you try and use it. If you wanted the function to have parameters, you could call it like functionname parameter1 parameter2 ...
Or you could use global variables instead.
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LEARN ABOUT OPENSOLARIS
tk_getrootcoords
Tk_GetRootCoords(3TK) Tk Library Procedures Tk_GetRootCoords(3TK)
__________________________________________________________________________________________________________________________________________________
NAME
Tk_GetRootCoords - Compute root-window coordinates of window
SYNOPSIS
#include <tk.h>
Tk_GetRootCoords(tkwin, xPtr, yPtr)
ARGUMENTS
Tk_Window tkwin (in) Token for window.
int *xPtr (out) Pointer to location in which to store root-window x-coordinate corresponding to left edge of tkwin's border.
int *yPtr (out) 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 doesn't have to communicate with the X server.
KEYWORDS
coordinates, root window
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTk |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tk is available on http://opensolaris.org.
Tk Tk_GetRootCoords(3TK)