The Edit Condition Dialog

This dialog allows you to edit a conditional statement.

Expression

This field contains the resulted conditional statement. Use the [ Validate ] button to validate it.

If the condition is invalid, you will be prompted with an error message that will indicate the beginning of the error.

Insert Operand

This section allows you to insert operands in the statement.

Property

Insert reference to an installer property which is already created in your package.

Environment Variables

Insert reference to an environment variable.

Folder

Insert reference to an installation folder.

Component Action

Insert a reference to the action state of a component (for example if a component will be installed or not).

Component State

Insert reference to the installed state of a component (for example if a component is already installed when the installation runs).

Feature Action

Insert reference to the action state of a feature (for example if a feature will be installed or not).

Feature State

Insert reference to the installed state of a feature (for example if a feature is already installed when the installation runs).

Constant

Add a constant to the conditional statement.

These constants represent the feature and component state values used in conditional expressions.

You can use the following:

• INSTALLSTATE_UNKNOWN (-1) - No action to be taken on the feature or component.
• INSTALLSTATE_ADVERTISED (1) - Advertised feature. This state is not available for components.
• INSTALLSTATE_ABSENT (2) - Feature or component is not present.
• INSTALLSTATE_LOCAL (3) - Feature or component is on the local computer.
• INSTALLSTATE_SOURCE (4) - Feature or component will run from the source.

Insert Operator

In this section you can insert operators in the conditional statement. Use the [ Insert ] button to add the selected one.

Logical operators:

• IMP - TRUE if left term is FALSE or right term is TRUE.
• EQV - TRUE if both terms are TRUE or both terms are FALSE.
• XOR - TRUE if either but not both terms are TRUE.
• OR - TRUE if either or both terms are TRUE.
• AND - TRUE if both terms are TRUE.
• NOT - Unary operator; inverts state of following term.

Comparative operators:

• = - TRUE if left value is equal to right value.
• ~= - TRUE if left value is equal to right value. The comparison is case insensitive.
• <> - TRUE if left value is not equal to right value.
• ~<> - TRUE if left value is not equal to right value. The comparison is case insensitive.
• > - TRUE if left value is greater than right value.
• ~> - TRUE if left value is greater than right value. The comparison is case insensitive.
• >= - TRUE if left value is greater than or equal to right value.
• ~>= - TRUE if left value is greater than or equal to right value. The comparison is case insensitive.
• < - TRUE if left value is less than right value.
• ~< - TRUE if left value is less than right value. The comparison is case insensitive.
• <= - TRUE if left value is less than or equal to right value.
• ~<= - TRUE if left value is less than or equal to right value. The comparison is case insensitive.

SubString/Bitwise Operators

Substring operators can occur between two string values.

• >< - TRUE if left string contains the right string.
• ~>< - TRUE if left string contains the right string. The comparison is case insensitive.
• << - TRUE if left string starts with the right string.
• ~<< - TRUE if left string starts with the right string. The comparison is case insensitive.
• >> - TRUE if left string ends with the right string.
• ~>> - TRUE if left string ends with the right string. The comparison is case insensitive.

Bitwise operators can be used between two integer values.

• >< - TRUE if the left and right integers have any bits in common.
• << - TRUE if the high 16-bits of the left integer are equal to the right integer.
• >> - TRUE if the low 16-bits of the left integer are equal to the right integer.

Predefined conditions

Select a predefined condition. Use the [ Insert ] button or double click it in the list to do that.

When adding a predefine condition that contains reference to a component or a feature, you will be prompted to select one from the project.