See Also Examples Applies To
Returns an available compression value which can be used by the opened source in its current configuration for file transfer mode.
Syntax
object.TwainGetAvailableCompressionNo (nNumber)
The TwainGetAvailableCompressionNo syntax has these parts:
| Part | Description |
| object | Required. An object expression that evaluates to an object in the Applies To list. |
| nNumber | Required. Long. Index of the available file format value. Must be a value between 1 and TwainGetAvailableCompressionCount() returned value. |
Returns
Long. If fail, returns -1 else if success, The selected compression value. Can be:
TWCP_NONE = 0
TWCP_PACKBITS = 1
TWCP_GROUP31D = 2
TWCP_GROUP31DEOL = 3
TWCP_GROUP32D = 4
TWCP_GROUP4 = 5
TWCP_JPEG = 6
TWCP_LZW = 7
TWCP_JBIG = 8
TWCP_PNG = 9
TWCP_RLE4 = 10
TWCP_RLE8 = 11
TWCP_BITFIELDS = 12
Remarks
Before using this function check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN)
To get the TWAIN state, use the TwainGetState() function.
Category
TWAIN Functions