# Open

Opens a document.

The properties that begin with "`OPEN`" (for example, the `OPENMode` property and `OPENWaitOnOpen` property) apply to the `Open` method. However, they do not apply to the initial call to the `Open` method; that is, they do not affect the currently opened document and apply only to documents opened with subsequent calls to the `Open` method. See Control Properties.

## Syntax

    nRet = KeyView.Open(FileName)

## Parameters

Parameter | Type | Description
--- | --- | ---
`Filename` | String | A string containing the file name of the document to open.

## Returns

Type | Description
--- | ---
Short | `0` – if an error occurs during open. `1` – if the document opened successfully. `2` – if the document is of an unknown format. `3` – if no viewer is available for the document format. `4` – if the document is password-protected. `5` – if the drawing routines have not been initialized. `6` – if the requested page does not exist, or is being displayed before all previous pages have been displayed. `7` – if the document does not support this feature (for example, ZIP files, video, or audio). `8` – if the KeyView license is invalid. `9` – if the KeyView license is expired. `10` – if the input file or stream is invalid or corrupt.

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