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version 2003
PA_VirtualStructureDefined → char
| Parameter | Type | Description | |
| This command does not require any parameters | |||
| Function result | char | ← | 1 if virtual sructure is defined, else 0 |
Description
The command
PA_VirtualStructureDefined
returns 1 if the virtual structure is defined in 4th Dimension, otherwise it returns 0.
By default, real structure is used, and you can tell 4D to switch between virtual and real structure by calling
PA_UseVirtualStructure
and
PA_UseRealStructure
.
Note that
PA_VirtualStructureDefined
returns 1 if 4D itself knows about virtual structure, it does not depend of the last call to
PA_UseVirtualStructure
and
PA_UseRealStructure
.
Once you know if the virtual structure mode is defined, you can call routines that return information about the true/virtual tables and fields number, such as
PA_GetTrueTableNumber
,
PA_GetVirtualTableNumber
.
The virtual structure is used when the 4D commands
SET TABLE TITLES
and
SET FIELD TITLES
are called.
Example
See
PA_UseVirtualStructure
for an example of use.
See Also
PA_GetTrueFieldNumber , PA_GetTrueTableNumber , PA_GetVirtualFieldNumber , PA_GetVirtualTableNumber .
Error Handling
always returns
eER_NoErr