| Example-VB |
Forces the generation or regeneration of the specified image’s thumbnail representation.
| Ö | Imaging for Windows Professional Edition V1.0, V1.1, and V2.0 |
| Ö | Imaging for Windows 95 and 98 |
| Ö | Imaging for Windows NT 4.0 |
Image Thumbnail control
object.GenerateThumb Option [,PageNumber]
| Parameter | Data Type | Description |
| Option | Integer | Indicates when the Thumbnail of a specified page should be generated. Allowable values are: | |
| Setting | Description | ||
| 0 | Generates a thumbnail if one has not already been obtained Not specifying a PageNumber, or specifying a PageNumber of 0 causes all pages that have not been obtained to be generated. |
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| 1 | Causes the thumbnail to be generated immediately. If the thumbnail was previously generated, a new one will be obtained. Not specifying a PageNumber, or specifying a PageNumber of 0 causes all pages that have not been obtained to be generated. |
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| 2 | Suppresses the regeneration of thumbnails while the Image property is being set. This is useful for creating a temporary file for the current image and setting the Image property to the new file name without regenerating all of the thumbnails. Note: Once the Image property has been updated, reset this value to the previous setting so that thumbnails are updated correctly in future operations. |
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| PageNumber | Long | Optional. The number of the page for which a Thumbnail is generated. If a value is not specified, a default value of 0 (indicates ALL pages are to be generated) is used. |
This method should be called to reflect any changes made to the image file after a previous thumbnail was generated.
It is not always necessary to obtain new thumbnails (Option =1). Thumbnail images that have been generated during the current session remain buffered, even though they may not be displayed.
Use caution when using a PageNumber of 0. Resulting operations can be lengthy.