https://community.intel.com/t5/Intel-Fortran-Compiler/Checkboxes-in-Listview-control/m-p/841668#M59637 Hi,<BR />I want some information on how to check and uncheck in a listview control. I don't have an image list in my listview control just the extended style for displaying check boxes.But I am unable to process check box messages.<BR />I am not sure what the specific values of elements of the lv_item struct should be(the lvitem%state,lvitem%statemask,etc).<BR /><BR />I am able to check the checkboxes if I do the following:<BR />lvi%state=8192<BR />lvI%stateMask = LVIS_STATEIMAGEMASK<BR />ret = SendMessage (hwndlist, LVM_SETITEMSTATE, <BR />sz_list,LOC(lvi)) <BR /><BR />and uncheck them by setting lvi%state to 0.<BR />But this is different from what has been given in help for the state parameter.<BR /><BR />In Help they have asked us to use a value for the state member to be the one-based index of the state image shifted left 12 bits. The stateimage index value is 2 in my case because that index when shifted by 12 bits results in 8192(the value I've used to check the check boxes).But how will zero cause them to be unchecked again?<BR />Thanks,<BR />Archana. Tue, 13 Aug 2002 05:17:05 GMT rjar 2002-08-13T05:17:05Z https://community.intel.com/t5/Intel-Fortran-Compiler/Checkboxes-in-Listview-control/m-p/841668#M59637 Hi,<BR />I want some information on how to check and uncheck in a listview control. I don't have an image list in my listview control just the extended style for displaying check boxes.But I am unable to process check box messages.<BR />I am not sure what the specific values of elements of the lv_item struct should be(the lvitem%state,lvitem%statemask,etc).<BR /><BR />I am able to check the checkboxes if I do the following:<BR />lvi%state=8192<BR />lvI%stateMask = LVIS_STATEIMAGEMASK<BR />ret = SendMessage (hwndlist, LVM_SETITEMSTATE, <BR />sz_list,LOC(lvi)) <BR /><BR />and uncheck them by setting lvi%state to 0.<BR />But this is different from what has been given in help for the state parameter.<BR /><BR />In Help they have asked us to use a value for the state member to be the one-based index of the state image shifted left 12 bits. The stateimage index value is 2 in my case because that index when shifted by 12 bits results in 8192(the value I've used to check the check boxes).But how will zero cause them to be unchecked again?<BR />Thanks,<BR />Archana. Tue, 13 Aug 2002 05:17:05 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Checkboxes-in-Listview-control/m-p/841668#M59637 rjar 2002-08-13T05:17:05Z