Microsoft Visual Basic 3.00                            Microsoft Corporation
Technical Notes

TN003.TXT:  GENER.VBX Custom Control Notes

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Creating a Custom Control from an Existing DLL
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If you have an existing set of functions in a DLL, you can easily create
a custom control that allows a user to access the functions indirectly.
This allows you to use the custom control in Visual Basic as well as in
Visual C++ environments.

A custom control that provides a high-level interface
to a set of DLL functions is referred to a wrapper. The Communications custom
control, shipped in both the Visual Control Pack and the Visual Basic 3.0
Professional Edition, is an example of a custom control wrapper.

The Control Development Guide contains Appendix E, "Creating a Custom Control
from an Existing DLL", which explains some of the issues involved in creating
a custom control wrapper.

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GENER.VBX Sample
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The GENER.VBX sample illustrates some techniques in creating a custom control
wrapper. The sample is made up of the following files:

	GENER.C
	GENER.DEF
	GENER.H
	GENER.RC
	GENER.VBX
	GENERCD.BMP
	GENERCU.BMP
	GENEREU.BMP
	GENERMU.BMP
	GENFUN.C
	GENFUN.H
	MAKEFILE

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GENERAPP Sample
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The GENERAPP Visual Basic sample uses the GENER.VBX custom control. The sample
is made up of the following files:

	GENERAPP.FRM
	GENERAPP.MAK