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The rwnet4.dll is aimed for use with MapInfo / MapBasic.
Since MapInfo is a single user application, we have made several changes to make development easier.
Rather than doing Create/Free methods, we use pre-allocated objects.
Objects are referenced either indirectly (single instance) or by their index (multi instance).
Classes referenced indirectly:
Classes / types referenced by index (handle):
If null-element is true, you can pass 0 as index / handle, when you want to pass nil as parameter.
Function naming convention
TImport.Execute becomes TImport_Execute.
TCalc.IsoCost becomes TCalc_IsoCost.
Some method names have been shortened due to max length = 31 characters.
All definitions can be seen in the rwnet4.def file along with a sample application, covering key areas.
Two versions exists:
•rwnet4_32.def for MapInfo 10.0-15.0
•rwnet4.def for MapInfo 15.2.2 and up.
Call method "InitPassword".
Since RW Net 4 is Unicode enabled and Mapbasic isn't, it is required to do an internal conversion in all function calls involving strings.
This is handled automatically through a global variable, which sets the codepage you are using in MapBasic.
Default is the system codepage.
Methods: GetCodepage / SetCodepage.
GIS output format
There is a global variable for output format, which is gfMITAB by default.
This means it is skipped from all function calls having a gisformat parameter.
Methods: GetGISformat / SetGISformat.
You can get the current codepage for your table by calling function CharSet2CP, where you pass the return value from TableInfo(tableid,TAB_INFO_CHARSET).
Then call TNetwork_SetCodepage to define which codepage is used in all output - also from TDrivingDirections etc.
Colours are read/set directly in MapInfo colour format (RGB <> BGR), while the .NET and VCL versions uses windows colour scheme.
If an error happens when calling a method, you can use one of these 2 functions to test it:
The messages are cleared after each successful method call.
These can all be turned on/off by calling ShowProgress with 0/1 as parameter.
The progress is then shown with a built-in dialog.
Missing functionality compared with VCL / .NET version
•GISarray output as format
•Direct access to TPolyGeneration