Query System – Function 20

This function determines the level and version of WHLLAPI under which your Windows HLLAPI application is running.

Prerequisite functions

None.

Function call

WinHLLAPI(QUERYSYSTEM,lpbyString,lpwLength,lpwReturnnCode)

Call parameters

Parameter	Description
Data String	Buffer for query data, must be defined for 35 bytes.
Data Lenght	NA (length of 35 is implied).
PS Position	NA

Return parameters

Parameter	Description
Data String	System status*a 35-byte string with the following format: Byte 1 WinHLLAPI version number Bytes 2-3 WinHLLAPI level number Bytes 4-9 WinHLLAPI version date (mmddyy) Bytes 10-12 Reserved Byte 13 Always “U” Byte 14 Always “E” Bytes 15-16 WinHLLAPI product version number Bytes 17-18 WinHLLAPI product level number Byte 19 Reserved Bytes 20-23 Reserved Bytes 24-27 Reserved Bytes 28-29 Reserved Bytes 30-31 Reserved Byte 32 Reserved Bytes 33-35 Reserved

Parameter

Description

Data String

System status*a 35-byte string with the following format:

Byte 1 WinHLLAPI version number

Bytes 2-3 WinHLLAPI level number

Bytes 4-9 WinHLLAPI version date (mmddyy)

Bytes 10-12 Reserved

Byte 13 Always “U”

Byte 14 Always “E”

Bytes 15-16 WinHLLAPI product version number

Bytes 17-18 WinHLLAPI product level number

Byte 19 Reserved

Bytes 20-23 Reserved

Bytes 24-27 Reserved

Bytes 28-29 Reserved

Bytes 30-31 Reserved

Byte 32 Reserved

Bytes 33-35 Reserved

Return code

Code	Description
WHLLOK	The query completed successfully.
WHLLSYSERROR	The function failed due to a system error. Any time results are unpredictable.