Problem in finding margin values in framemaker 7.1

[_Mathew_cj_]

Hai All
I am new to this forum.
Through FrameMaker 7.1 FDK i am trying to calculate current document layout information like document width, text frame width and left margin with the help of these values I am trying to get Right margin value. In some particular layout i am getting the wrong right margin.
Find the layout values
FP_PageWidth: 572.597 pt /*document width*/
FP_LocX: 57.070 pt /*Text frame left margin*/
FP_Width: 456.000 pt /*Text frame width*/

The calculated Right margin should be 59.527 pt but it is calculating the value as 59.528 pt my code follows

#include "fmetrics.h"

#define pts (MetricT) 65536

MetricT docwidth, Fr_width, Fr_LeftMrg, Fr_RightMrg;

docwidth = F_ApiGetMetric(FV_SessionId, docId, FP_PageWidth);
if (F_ApiGetObjectType(docId, objId) == FO_TextFrame)
{
Fr_width = F_ApiGetMetric(docId, objId, FP_Width);
Fr_LeftMrg = F_ApiGetMetric(docId, objId, FP_LocX);
Fr_RightMrg = (Pwidth - (Fr_width + Fr_LeftMrg));

F_Printf(NULL, "docwidth: %3.3f\n", F_MetricToFloat(docwidth));
F_Printf(NULL, "Fr_width: %3.3f\n", F_MetricToFloat(Fr_width));
F_Printf(NULL, " Fr_LeftMrg: %3.3f\n", F_MetricToFloat(Fr_LeftMrg));
F_Printf(NULL, " Fr_RightMrg: %3.3f\n", F_MetricToFloat(Fr_RightMrg));
}
Please advice is there any other way to get the correct values.

Thanks in advance
Mathew.cj

[AxialInfo]

Mathew, if you have not yet done so, you might find a better response by posting to the Frame Dev group, here: http://groups.yahoo.com/group/frame_dev/

[_Mathew_cj_]

Hai Sheila,

Thanks for the webpage link.

Thanks
Mathew