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.NET Forum / Languages / Managed C++ / April 2007how catch combination of key??
Hi, I am working on SDI base application using vs2k5. I need to perform some task on combination of keys (link ctrl+v). I wrote WM_KEYDOWN message in my view for control command keys (like Delete, Insert, etc) but unable to catch combination of keys in WM_KEYDOWN message. I tried to use GetKeyStatus function in WM_KEYDOWN message but not gets any positive results. Please guide me, how I can control combination of keys in WM_KEYDOWN message, like, if I wants to perform some task on ctrl+v for this, what I do for it?? Regards, -aims >I am working on SDI base application using vs2k5. I need to perform >some task on combination of keys (link ctrl+v). I wrote WM_KEYDOWN >message in my view for control command keys (like Delete, Insert, etc) >but unable to catch combination of keys in WM_KEYDOWN message. For the situation you mentioned you'd normally create an accelerator entry for the key combination in the application's resource. Dave > >I am working on SDI base application using vs2k5. I need to perform >>some task on combination of keys (link ctrl+v). I wrote WM_KEYDOWN [quoted text clipped - 3 lines] > For the situation you mentioned you'd normally create an accelerator > entry for the key combination in the application's resource. And be sure to call TranslateMessage from your message loop. > Dave > For the situation you mentioned you'd normally create an accelerator > entry for the key combination in the application's resource. It will not work for me because I need to perform some actions on ctrl +v. I tried following code in WM_KEYDOWN which work on ctrl+shift+v but not working on ctrl+v. if(nChar == 'V' && (0x8000 & GetKeyState(VK_CONTROL))) { //do some thing ... } can you please guide me how i can fix this problem?? Regards, -aims >> For the situation you mentioned you'd normally create an accelerator >> entry for the key combination in the application's resource. > >It will not work for me because I need to perform some actions on ctrl >+v. What do you mean? That's what accelerators are intended for. >I tried following code in WM_KEYDOWN which work on ctrl+shift+v >but not working on ctrl+v. [quoted text clipped - 4 lines] > ... >} I can't see any apparent reason why that shouldn't work - what code do you have for the Ctrl+Shift+V case? Dave > >if(nChar == 'V' && (0x8000 & GetKeyState(VK_CONTROL))) > >{ > > //do some thing > > ... > >} Hi Dave! This code works when I removed all combination related to Ctrl and Shift keys from Accelerated. The following entries was in my accelerated file. Shift+Insert Ctrl+C Ctrl+X But I am not able to understand why it was not working. I was trying to control Ctrl+V key combination which was not in my accelerated keys list. Accelerated key has high priority and then pass to messages?? >> >if(nChar == 'V' && (0x8000 & GetKeyState(VK_CONTROL))) >> >{ [quoted text clipped - 6 lines] >This code works when I removed all combination related to Ctrl and >Shift keys from Accelerated. Can you explain in more detail what you removed? >The following entries was in my >accelerated file. >Shift+Insert >Ctrl+C >Ctrl+X By "accelerated file", do you mean the accelerator table resource for your application - or something else? >But I am not able to understand why it was not working. I was trying >to control Ctrl+V key combination which was not in my accelerated keys >list. Which (and what type of) window are you trying to catch these accelerator key combinations for? Dave Dave, > Can you explain in more detail what you removed? I was making SDI base application and by that time following information I seen, which includes Ctrl+V as well. IDR_MAINFRAME ACCELERATORS BEGIN "N", ID_FILE_NEW, VIRTKEY,CONTROL "O", ID_FILE_OPEN, VIRTKEY,CONTROL "S", ID_FILE_SAVE, VIRTKEY,CONTROL "P", ID_FILE_PRINT, VIRTKEY,CONTROL "Z", ID_EDIT_UNDO, VIRTKEY,CONTROL "X", ID_EDIT_CUT, VIRTKEY,CONTROL "C", ID_EDIT_COPY, VIRTKEY,CONTROL "V", ID_EDIT_PASTE, VIRTKEY,CONTROL VK_BACK, ID_EDIT_UNDO, VIRTKEY,ALT VK_DELETE, ID_EDIT_CUT, VIRTKEY,SHIFT VK_INSERT, ID_EDIT_COPY, VIRTKEY,CONTROL VK_INSERT, ID_EDIT_PASTE, VIRTKEY,SHIFT VK_F6, ID_NEXT_PANE, VIRTKEY VK_F6, ID_PREV_PANE, VIRTKEY,SHIFT END After that I was removed ID_EDIT_PASTE resource ID from accelerator table and try to capture Ctrl+V by code but it was not working.. One by One I removed all entries from accelerator but WM_KEYDOWN message start working on when no entry left in accelerator table.. > By "accelerated file", do you mean the accelerator table resource for > your application - or something else? I wrote "accelerator file" by mistaken that is accelerator table.. Regards, -aims >> Can you explain in more detail what you removed? > [quoted text clipped - 8 lines] >After that I was removed ID_EDIT_PASTE resource ID from accelerator >table and try to capture Ctrl+V by code but it was not working. OK, I just wanted to be clear that it was the resource accelerator table you were referring to. >One >by One I removed all entries from accelerator but WM_KEYDOWN message >start working on when no entry left in accelerator table. I don't immediately know why that should be - are you saying that you don't receive *any* WM_KEYDOWN messages, or just the ones that had accelerators defined? Why do you want to do the key detection in code rather than relying on the existing accelerator & command messages they will create? Dave > I don't immediately know why that should be - are you saying that you > don't receive *any* WM_KEYDOWN messages, or just the ones that had > accelerators defined? > > Why do you want to do the key detection in code rather than relying on > the existing accelerator & command messages they will create? some how accelerators was not working.. thats why, i was write WM_KEYDOWN message.. Regards, -aims >> I don't immediately know why that should be - are you saying that you >> don't receive *any* WM_KEYDOWN messages, or just the ones that had [quoted text clipped - 5 lines] >some how accelerators was not working.. thats why, i was write >WM_KEYDOWN message.. I think you should find out why they're (apparently) not working for you - try using Spy++ to see where the command messages for the accelerator keystrokes are going. Dave > I think you should find out why they're (apparently) not working for > you - try using Spy++ to see where the command messages for the > accelerator keystrokes are going. Hi Dave, Please guide me, how to use Spy++ to see where the command messages for the accelerator keystrokes are going? Will I use "Find Window tool", select Messages Radio button Under "Show Label" and using Finder Tool check all messages. Is this right procedure?? Please guide me, In case of wrong. Regards, -aims >Please guide me, how to use Spy++ to see where the command messages >for the accelerator keystrokes are going? >Will I use "Find Window tool", select Messages Radio button Under >"Show Label" and using Finder Tool check all messages. Is this right >procedure? Use Log Messages, and its Finder tool to select the top level window of your application. You can also set the Child Windows check box. In the messages pane, just select WM_COMMAND. Then try the accelerator keys and check you do see the command messages being generated. Assuming you do, then that's proof that the accelerator is working and you should be able to handle those command messages in your application. Dave Hi, Right, Thanks Dave.. :) Regards, -aims Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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