Hello, I have got a button that calls out a subroutine, which in turn invokes another process...this another process is a command line command and it generates output to STDOUT. My objective is to turn my "frame" into a text widget as soon as the button is pressed so that in the text widget I can display the output of the command line command (another process). The problem is that the button stays depressed until the command line command process is complete and the text widget is displayed with the output WHEN the process is complete - not what I want. I want the output to be displayed WHILE the process is work in progress...any ideas how to accomplish this? I have tried open() as shown in code below but didn't help. Also tried backticks and didn't work either...any ideas are appreciated. Code is below. Sub create_copy_project_command just formulates the command line command and returns the string. Thanks! 
# get rid of top_frame
$top_frame->packForget();

# create and display text widget
my $tw = $second_frame->Text()->pack();

my $first_line = "Copying project...please wait";
$tw->insert( 'end', $first_line );

my $final_copy_project_command = &create_copy_project_command;

open( COPY_PROJ, "$final_copy_project_command|" );

while ( my $copy_proj_line = (<COPY_PROJ>) ) {
    $tw->insert( 'end', $copy_proj_line );
}

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In reply to how to display output of a process in text widget in real time by perlnu

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