Here is the sample code:
Add Text:
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PromptPopup ("Please Input Your Label", "Please Input Your Label", LabelBuff, 499);
controlID[count] = NewCtrl (panels[current].panel_handle, CTRL_TEXT_MSG, LabelBuff, eventData1, eventData2);
MakeMovableCtrl (panels[current].panel_handle, controlID[count], "", 1, 1, 1, 1);
getTextPosX[count] = eventData2 * 1.000000;
getTextPosY[count] = eventData1 * 1.000000;
count++;
Print Graph:
============
for (i = 0; i < count; i++)
{
GetCtrlAttribute (panels[current].panel_handle, controlID[i], ATTR_CTRL_VAL, &LabelBuff);
plotTextHandle[i] = PlotText (panels[current].panel_handle, PLOTPANEL_GRAPH, getTextPosX[i], getTextPosY[i], LabelBuff, VAL_MENU_META_FONT, VAL
_BLACK, VAL_TRANSPARENT);
}