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Delphi Troubleshooting

File not found: MSHTML_TLB.dcu

Symptom:

When compiling a unit a "uses" clause generates the following error:

[Fatal Error] File not found: 'MSHTML_TLB.dcu'

Cause:

The unit MSHTML_TLB provides access to a number of types that are frequently used with TWebBrowser, for example IHTMLDocument2. However the unit is only available after the Microsoft HTML Object Library has been imported - and if it has not been imported then the compiler will generate this error.

Remedy:

Import the "Microsoft HTML Object Library":

  1. Start up Delphi.
  2. On the "Component" menu in the main toolbar select "Import ActiveX Control..."
  3. In the list box scroll and and select "Microsoft HTML Object Library".
    The "Class names" should then list "TScriptlet".
  4. Click "Install..."
  5. Then click "OK" on the "Install" form that appears and "Yes" on the confirm prompt.

These notes are believed to be correct for Delphi 6 (and Seth Ferrante reports them to be correct for Delphi 7), and may apply to other versions as well.