Descriptive Programming in Winrunner

[nehasahu]

set_window (Login, 3);
Have to write descriptive programming for the Above line
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neha="{class:window,label:Login,MSW_class:"#32770"}";


set_window (neha, 3);
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The Login window is getting displayed but following error is also displayed
Window: "{class:window,label:Login,MSW_class:-10107"

Error: Syntax error.