MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE Manuale Utente Scaricare il pdf (Pagina 25)

25Writing CFX Tags with Visual C++

To install the CFX Tag Wizard, follow these steps:

1. If Visual C++ is currently running, close it.

2. Copy the cfxwiz_vc50.awx ﬁle to Visual Studio’s Template folder. For a typical Visual

Studio 6.0 installation, that folder is located at: C:\Program Files\Microsoft Visual

Studio\Common\MSDev98\Templates.

3. Copy the cfx.h ﬁle from the CFusionMX7\cfx\include folder to the Visual C++ Include

folder. For a typical Visual Studio 6.0 installation, that folder is located at: C:\Program

Files\Microsoft Visual Studio\VC98\Include.

4. Locate the CreateRegistryKey.reg ﬁle (included with this chapter’s listings) and double-

click on it. If you get a conﬁrmation message, click OK to accept the change to the

registry. After a moment, you should receive a message saying the information was

imported successfully.

5. Start Visual C++. The ColdFusion Tag Wizard should appear if you choose File, New,

then select the Projects tab.

NOTE

A bit of explanation about that .reg file: at the time of this writing, the Tag Wizard had not been updated to reflect the fact that ColdFu-

sion no longer stores information about registered CFX tags in the Windows Registry (this information is now kept in an XML configu-

ration file within the CFusion directory tree). Therefore, a small change to the registry needs to be made before the Wizard will work

properly. The CreateRegistryKey.reg file referred to in the steps listed above simply adds a registry key (folder) called HKEY_LOCAL_

MACHINE\SOFTWARE\Allaire\ColdFusion\CurrentVersion\CustomTags, which is what the Wizard needs to work properly. If you

prefer to add the key to the registry manually using the Registry Editor that ships with Windows, go ahead. Just be careful because

making an incorrect change could seriously mess up your system!

Starting a New CFX Tag Project

Now that the ColdFusion Tag Wizard has been installed, you can use it to quickly create skeleton

code for a new CFX tag. Just follow these steps:

1. Launch Visual C++.

2. Choose File, New.... The New dialog box appears.

3. Select the Projects tab, then select the Cold Fusion Tag Wizard (Figure 30.6).

4. Enter a name for your new project in the Project name ﬁeld. I recommend using the

name of the CFX tag. For this example, use

CFX_ComputeStandardDeviation as the

project name.

5. Leave the Create new workspace and Win32 options checked, as shown in Figure 30.6.

6. Click OK. The ColdFusion Tag Wizard appears (Figure 30.7).

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MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE Manuale Utente Pagina 25