F1 Key input

03-18-2002, 02:28 PM

does any1 know how to get the prog to recognise F1 as an input button to so i can link in a help interface

cheers

Crossbow · 03-18-2002, 08:53 PM

Yes, it is very simple:

PHP Code:

  //Inside the message switch in the main window loop

case WM_KEYDOWN:

    switch(wParam){

           case VK_F1:

                  //Do whatever

            break;

     }

break;

One downside to this simple approach is that it will repeat the process every few milliseconds you hold the F1 key down. To correct that make a bool variable called F1pressed or something and set it to true at the end of the VK_F1 case statement, then code a WM_KEYUP the same as above just make it so it sets the bool variable to FALSE. Then set up an if statement around your help code to check if the bool variable is TRUE or not. I hope you get this!

Kebab Monster · 03-19-2002, 03:44 AM

What library do i need to include for WM_KEYDOWN, wParam and VK_F1?

cheers

**Bubba** · 03-19-2002, 02:53 PM

That code is for Windows only.

If you wish to do this in DOS, you will need to write and INT 9 handler. Then you only need to check for the correct scan code for the F1 key (find a scan code table for the keyboard).

Kebab Monster · 03-20-2002, 04:56 PM

Thnx mate

03-18-2002, 02:28 PM	#1
Kebab Monster Guest Posts: n/a	F1 Key input does any1 know how to get the prog to recognise F1 as an input button to so i can link in a help interface cheers

03-18-2002, 08:53 PM	#2
Crossbow Registered User Join Date: Nov 2001 Posts: 162	Yes, it is very simple: PHP Code: `//Inside the message switch in the main window loop case WM_KEYDOWN: switch(wParam){ case VK_F1: //Do whatever break; } break;` One downside to this simple approach is that it will repeat the process every few milliseconds you hold the F1 key down. To correct that make a bool variable called F1pressed or something and set it to true at the end of the VK_F1 case statement, then code a WM_KEYUP the same as above just make it so it sets the bool variable to FALSE. Then set up an if statement around your help code to check if the bool variable is TRUE or not. I hope you get this!
Crossbow is offline

03-19-2002, 03:44 AM	#3
Kebab Monster Registered User Join Date: Mar 2002 Posts: 3	What library do i need to include for WM_KEYDOWN, wParam and VK_F1? cheers Last edited by Kebab Monster; 03-19-2002 at 04:00 AM.
Kebab Monster is offline

03-19-2002, 02:53 PM	#4
Bubba Super Moderator Join Date: Aug 2001 Posts: 7,817	That code is for Windows only. If you wish to do this in DOS, you will need to write and INT 9 handler. Then you only need to check for the correct scan code for the F1 key (find a scan code table for the keyboard).
Bubba is offline

03-20-2002, 04:56 PM	#5
Kebab Monster Registered User Join Date: Mar 2002 Posts: 3	Thnx mate
Kebab Monster is offline

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