Registry User Function Library for Crystal Reports

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The Registry User Function Library for Crystal Reports can retrieve values from the User registry.

It can also retrieve the disk label and serial number.

This function library adds some useful functions to Crystal reports.

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For example, we've included an Alert function, which you can use to stop your report to warn users of urgent conditions in the database.

Registry Functions:

GetRegCurrentUser(Key, Prop)

GetRegLocalMachine(Key, Prop)

These functions will retrieve a value from the CurrentUser and LocalMachine hives of the Windows registry. If the Key or property is not valid the function will return a blank value.

Random Functions:

GetRegRandomSeed(Seed)

GetRegRandom

Crystal reports 8 added a random function to the formula editor, so these functions are here for users of earlier versions of Crystal Reports. The GetRegRandom should be calcualred WhileReadingRecords to get individual values for each record.

DiskVolume Functions:

GetVolSerialNumber(Drive)

GetVolLabel(Drive)

GetVolInstallPath

These will retrieve the Serial number and volume label of the specified drive. GetVolInstallPath will retieve where the User function library has been installed (Usually \Windows\Crystal or \WinNT\Crystal)

Alert Function:

GetVolAlert(Message, Caption)

This will stop your report, and display a message (with the required caption) and then continue processing the report. If you accidentally specify a condition where an excessive number of alerts have been raised, you can cancel the messages.

Size Functions

GetSizeFt(Value) value is in inches
GetSizeHrs(Value) value is in minutes
GetSizeMetric(Value) value is in 1/000 of the units

These functions convert a number into the appropriate formats and display the required units of measure.

Solve problems with this UFL. Here's an example. A user posed the following problem:

Our Crystal Reports require Users to provide their USERID as a parameter for record selection. We would like to eliminate the requirement to enter the USERID from our reports by:

Adding a specific USERID to the Registry.
Using a user function to retrieve the specific USERID from the user Windows Registry.

Will your Registry User Function Library help with this?

Solution:
Yes, this can be done provided you use a subreport. The reason is that User Function Libraries (UFLs) are invoked once the report is processing data. Therefore, while we could retrieve the information you want in the Registry, it would be too late to use for the DB parameter in the main report.

The exception to this is if the parameter is requested in a subreport, as the main report will have processed the UFL prior to running the subreport.

Tip: Remember to ensure you retrieve at least one record in your main report (or else the subreport will not run).

Click here to download a PDF with the of functions described above. Better yet, order this amazing product.

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