See Also Examples Applies To
Tries to set the current image compression to use by the selected twain source for file transfer mode.
Since only certain file formats support compression, this capability must be negotiated after setting the desired file format with the TwainSetCurrentImageFileFormat() function.
Syntax
object.TwainSetCurrentCompression (nCompression)
The TwainSetCurrentCompression syntax has these parts:
| Part | Description |
| object | Required. An object expression that evaluates to an object in the Applies To list. |
| nCompression |
Required. Long. Image compression. 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 |
Returns
Boolean. True if success, else False -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.
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