$ifte function

$ifte(condition,value1,value2)

The $ifte function ("IF... Then... Else...") evaluates the conditional expression condition and returns value1 if the condition is true, or value2 if it is false. You can use this function to perform a conditional assignment.

Windows Installer does not support symbolic functions; if you use this function during an MSI build, you will get diagnostic message BLD:U0010 and the result is undefined.

Parameters

All parameters may contain symbolic references; these are resolved before the function is applied. See Examples below.

condition

The conditional expression to evaluate. If the expression is very complex, you may have to enclose it in backticks: `condition` to prevent premature interpretation. However, in most cases you can enter the condition as-is.

value1

The value that must be returned if condition evaluates to true.

value2

The value that must be returned if condition evaluates to false.

Examples

Here are some usage examples for this function:

<$ifte(TsuRunMode = 2, Uninstalling, Installing)>

Returns Uninstalling if the installer runs in Uninstall mode, or Installing otherwise.

<$ifte(<$fverpcmp(<SystemFolder>\mfc42.dll, 6.0)> >= 0, 1, 0)>

Returns 1 if the MFC42.dll version is 6.0 or later, 0 otherwise. You use expressions like this one to set a symbol value in a Set Variable action; the resulting symbol can then be used in other conditions. (See the $fverpcmp function for more information about the version comparison.)