Return to Table of Contents

Run from Avenue Script

Included with the LinePoly installation are two additional scripts. LinePoly.Run takes three or four parameters and calls the DLL. LinePoly.Sample provides a sample script that will evoke LinePoly.Run.

To call LinePoly directly from your Avenue script, open a script and choose Script > Load System Script. From the dialogue, scroll down to LinePoly.Sample, choose it and click OK. The sample code will be loaded into the open script. The meaning and format of the parameters is described in the script.

Alternately, choose LinePoly.Run to get details on running the required DLL's directly.

Note there is an additional boolean parameter. If it is set true, the program will run without user interaction. In this mode, the dialog will be presented to monitor progress, but the user will not be able to modify anything unless the parameters will not work, such as a file not being available.

Return to Table of Contents

Run from C++

To run LinePoly directly from C++, ensure that ssi07.dll is within your path and include the following code:

HINSTANCE hDllEvokeBrowser = NULL;
hDllEvokeBrowser = LoadLibrary("c:\\Esri\\Av_gis30\\Arcview\\Bin32\\EvokeBrowser.DLL");
if (!hDllEvokeBrowser) {
    AfxMessageBox("Could not Load EvokeBrowser");
    return 0;
}
typedef DWORD (CALLBACK *DWLPSSD)(LPSTR, LPSTR, LPSTR, LPSTR, BOOL);
HINSTANCE hDll = NULL;
DWLPSSD lpProc = NULL;
hDll = LoadLibrary("c:\\Esri\\Av_gis30\\Arcview\\Bin32\\LinePoly.DLL");
if (hDll) {
    lpProc = (DWLPSSD)GetProcAddress(hDll, "LinePoly");
} else {
    AfxMessageBox("Could not Load Library");
    return 0;
}
if (!lpProc) {
    AfxMessageBox("GetProcAddress Failed");
    FreeLibrary (hDll);
    return 0;
}
char * pzLineFile[_MAX_PATH];
CString osPolygonFile;
CString osAttributes;
// Set line file, polygon file and attributes if required
int nReturn = (*lpProc)("c:\Esri\gis_30\ArcView\Help\LinePoly.htm",
                                pzLineFile,
                                osPolygonFile.GetBuffer(),
                                osAttributes.GetBuffer(),
                                false);
FreeLibrary (hDll);
if (nReturn) AfxMessageBox("Run successful");
else AfxMessageBox("Run failed");
return nReturn;

The second parameter is used to return the name of the line file actually chosen by the user. It should thus be allocated sufficient room to hold the longest path length.

The format for the shape files, that is pzLineFile and osPolygonFile, is

(path\\file1.shp)[(path\\file2.shp)...]