Prototype and description of the function getntvgridcount()

(Function of the unlock requiring group "NTv2 Tools")

getntvgridcount()
Determination of the count of grids contained in an NTv2 file.

Prototype of the DLL function in C++ syntax (attend lower case!):
extern "C" __declspec(dllimport) unsigned long __stdcall getntvgridcount(
     const char *pszFileNtv,
     unsigned long lAscii,
     unsigned short *ngridCount);

Prototype of the DLL function in Visual Objects syntax:
_DLL function getntvgridcount;
     (pszFileNtv as psz,;                  // 4 Byte, char*
     lAscii as logic,;                     // 4 Byte
     ngridCount ref word);                 // 4 Byte
as logic pascal:geodll32.getntvgridcount


The function returns for a ASCII or binary formatted NTv2 file the number
of the contained grids.


The parameters are passed and/or returned as follows:
pszFileNtv  File name of the ASCII or binary formatted NTv2 file from
            which the number of the contained grids is to be
            determined. The file name may contain a drive letter, a
            directory path and a file name extension.

lAscii      TRUE: The NTv2 file is ASCII formatted.
            FALSE: The NTv2 file is binary formatted.

nGridCount  The number of the grids contained in the NTv2 file. The
(ref)       number of the grids is returned by reference.

returnVal   In case of an error the function returns FALSE, otherwise TRUE.


Unlocking:
This function is a component of the unlock requiring function group "NTv2
tools". It is unlocked for unrestricted use together with the other functions
of the group by passing the unlock parameters, acquired from the software
distribution company, trough the function setunlockcode(). Without unlocking no
calls for test purposes (shareware principle) are possible with this function.