Note: This page includes content based on the F1 documentation for Centura development. It may be partially converted to support APF development, but should be regarded to be of uncertain actuality. It is provided as is. Eventually, it should be replaced by documentation available from within Visual Studio.
Const.PM_PictureShow
Applications and the framework send the Const.PM_PictureShow to cPictureDataItem fetch and display the picture.
| Name | Description |
|---|---|
| nWhat = wParam | Standard method parameter. Possible values are Const.METHOD_Inquire, Const.METHOD_Execute |
| lParam | Unused |
When nWhat = Const.METHOD_Inquire, the return value is TRUE if the picture hasn't already been fetched, FALSE otherwise.
When nWhat = Const.METHOD_Execute, the return value is TRUE if the picture is successfully fetched, FALSE otherwise.
For optimized performance when working over a slow network connection, it is possible for the user to turn off automatic fetch of BLOBs (which included pictures). When the automatic fetch is turned off, the Const.PM_PictureShow message can be used to download a single picture.