See Also Examples Applies To
Returns the current image compression used by the selected twain source for file transfer mode.
Syntax
object.TwainGetCurrentCompression ()
The TwainGetCurrentCompression syntax has these parts:
| Part | Description |
| object | Required. An object expression that evaluates to an object in the Applies To list. |
Returns
Long. If fail, -1 : probably not supported by the current device -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.
If succes, Current file format to use in file transfer mode. 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