Questions tagged [ipreviewhandler]
11 questions
10
votes
1 answer
How to get the IPreviewHandler for a file extension?
How do i get the shell IPreviewHandler for a particular file extension?
Background
Windows allows developers to create a preview handler for their custom file types:
Preview handlers are called when an item is selected to show a lightweight, rich,…
Ian Boyd
- 246,734
- 253
- 869
- 1,219
4
votes
0 answers
How to host a preview handler in a dialog
I'm attempting to host a file preview handler within a dialog. I've set up an event sink for selection changes in Explorer. When the selection changes, I feed the selected shell item to the dialog, which in turn feeds it to a function that…
user13366655
4
votes
2 answers
IPreviewHandler Unload COM Objects takes a long time and freezes the application
I am trying to use the IPreviewHandler interface to display a windows 7 like preview on a TPanel within my application.
The issue arises when I am destroying the preview object by calling Unload (which is meant to dispose of the COM objects) and…
MBass
- 63
- 4
2
votes
1 answer
How to Properly Use and Instantiate existing Preview Handlers
I am trying to use existing preview handlers to display previews of files.
I wrote a simple test program to 1) find the CLSID of the preview handler for a given file, 2) instantiate the preview handler, 3) initialize it, either by stream or file and…
lulle2007200
- 888
- 9
- 20
2
votes
1 answer
How to get the IPreviewHandler of a file type in the latest version of .Net
Recently at work I received a project that requires me to get a preview of a specific file type and display it in a preview pane (similar to the preview pane found in windows file explorer). After 3 or 4 days of extensive study on how to achieve…
Täuscherpferd
- 41
- 6
1
vote
1 answer
Windows preview handlers don't respect drawing area set with SetRect
I've been trying to use Windows preview handlers in my application and noticed that some of the preview handlers do not respect the drawing rectangle set with SetRect(&rect).
For example, with the Edge PDF preview handler (CLSID…
lulle2007200
- 888
- 9
- 20
1
vote
1 answer
IPreviewHandler SetWindow does not specify a size
I want to add a preview on my window. A rectangle is passed into the function in which the preview will be drawn, but for some reason the preview is drawn in the entire window and not in the specified rectangle.
RECT…
Hurr
- 55
- 1
- 8
0
votes
0 answers
Error in displaying the ribbon in Microsoft Word when using the preview via PreviewHandler
We display Microsoft Word documents (docx) in a viewer. The PreviewHandler is used for this purpose. In Microsoft Word 2021 the following problem occurs: the ribbon in Microsoft Word does not contain any content when Microsoft Word is started with a…
Björn
- 1
0
votes
0 answers
How to run a file preview handler through the surrogate host
According to the docs:
Preview handlers always run out of process. There are two methods of
implementing this:
A preview handler can be built as an in-process server but run
through an out-of-process surrogate host. This is the preferred
method.…
user13366655
0
votes
1 answer
How to disable preview handler for a given file path
I am writing an applications in C# and thought to working with PreviewHandler for Windows. I have just started to work with Windows Explorer and Preview Handler so don't know what to do and where to start. Frankly don't have any idea how does it…
Debhere
- 1,055
- 2
- 19
- 41
-1
votes
1 answer
Preview handler only works when application is invoked from Explorer
I made a simple application that creates a window and then uses preview handlers to display a preview of a file passed as an argument to the application, see code below.
This works perfectly fine when just drag'n'dropping the file to preview onto…
lulle2007200
- 888
- 9
- 20