🚀 go-pugleaf

Hi,

"RaynorPao" <RaynorPao.nospam@nospam.pchome.com.tw> wrote:
>Hi all:
>
>Is there an API can convert Key Name to Virtual Key Code?
>For example:
>
>char sz[16]="F1";
>int i=KeyNameToVirtualKeyCode(sz);
>
>The value of i will be VK_F1.

You can write this function. If you open Win32 
Programmer's Reference Help (page Search) and try to find 
next: "Virtual-Key Codes" you find table of Vitual Codes and 
mouse and keyboard.

Vladimir.

There is no API to do that, that I'm aware of.
You can do it like that or you can use a map,
something like this (untested) code

#include <map>
std::map<String, unsigned int> VirtualKeyMap;

unsigned int VirtualKey_NameToCode(String VKName)
{
    return VirtualKeyMap[VKName];
}

void Set_VirtualKeyMap()
{
    VirtualKeyMap["VK_LBUTTON" ] = 0x01;
    VirtualKeyMap["VK_RBUTTON"  ] =  0x02;
    VirtualKeyMap["VK_CANCEL"   ] =   0x03;
    VirtualKeyMap["VK_MBUTTON" ]  = 0x04;
    VirtualKeyMap["VK_XBUTTON1" ] = 0x05;
    VirtualKeyMap["VK_XBUTTON2"]  =  0x06;
    //VirtualKeyMap["" ] =  07;
    VirtualKeyMap["VK_BACK" ] = 0x08;
    VirtualKeyMap["VK_TAB" ] = 0x09;
    //VirtualKeyMap["" ] =   0A;
    //VirtualKeyMap["" ]  =   0B;
    VirtualKeyMap["VK_CLEAR"    ]  =  0x0C;
    VirtualKeyMap["VK_RETURN"   ] = 0x0D;
    //VirtualKeyMap["" ] =  0E;
    //VirtualKeyMap["" ] =  0F;
    VirtualKeyMap["VK_SHIFT"    ] = 0x10;
    VirtualKeyMap["VK_CONTROL"  ] = 0x11;
    VirtualKeyMap["VK_MENU"     ] = 0x12;
    VirtualKeyMap["VK_PAUSE"    ] = 0x13;
    VirtualKeyMap["VK_CAPITAL"  ] = 0x14;
    VirtualKeyMap["VK_KANA"     ] = 0x15;
    VirtualKeyMap["VK_HANGUEL"  ] = 0x15;
    VirtualKeyMap["VK_HANGUL"   ] = 0x15;
    //VirtualKeyMap["" ] =  16;
    //All the rest
}
//---------------------------------------------------------------------

__fastcall   TForm1 :: TForm1(TComponent* Owner)
        : TForm(Owner)
 {
    Set_VirtualKeyMap();
 }

void __fastcall TForm1:: Button1Click(TObject *Sender)
{
    ShowMessage(String(VirtualKey_NameToCode("VK_RETURN")));
    ShowMessage(String(VirtualKey_NameToCode("VK_SHIFT")));
}

Rodolfo

"RaynorPao" <RaynorPao.nospam@nospam.pchome.com.tw> wrote in message
news:3e8158e9@newsgroups.borland.com...
> Hi all:
>
> Is there an API can convert Key Name to Virtual Key Code?
> For example:
>
> char sz[16]="F1";
> int i=KeyNameToVirtualKeyCode(sz);
>
> The value of i will be VK_F1.
>
> Thanks.
> RaynorPao.
>
>

You can get the key name from the virtual code, but not the
other way round.

You can of course create a method that uses an array and
some mapping logic, but the easiest is to use brute force.

Say you have method VirtualKeyToKeyName that returns the
key name. You can then create a method, KeyNameToVirtualKey,
which calls VirtualKeyToKeyName until it returns a matching
key name:

string VirtualKeyToKeyName(int virtualKey) {
  // return key name
}

int KeyNameToVirtualKey(string keyName) {
  for (int i=0x08; i<0xFF; i++) {
    if (AnsiCompareText(keyName, VirtualKeyToKeyName(i)) == 0) {
      return i;
    }
  }
  return -1;
}

This approach is a little CPU-intensive. On the positive side
it's simple, and it's independent of the user's language settings.

Troels


RaynorPao wrote in message <3e8158e9@newsgroups.borland.com>...
>Hi all:
>
>Is there an API can convert Key Name to Virtual Key Code?
>For example:
>
>char sz[16]="F1";
>int i=KeyNameToVirtualKeyCode(sz);
>
>The value of i will be VK_F1.

Hi Vladimir, Rodolfo, Troels:

Thanks for your reply.
I think I'd better to write this function myself.

Thanks.
RaynorPao.