I have created an application which has a crystal report viewer embedded in it. But the *.rpt files that are going to be opened in the viewer are too big, and it waits for minutes while opening.
How can I put a progress bar or something to indicate that the program is still working while the file loads?

i suggest just change the curser to hour glass:
before the code that is loading the rpt this.Cursor = Cursors.WaitCursor; so users know that it is loading
and when it is done loading change the cursor back: this.Cursor = Cursors.Default;

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