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New Message on cochindotnet
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From: J.K.
Message 6 in Discussion
Hi Rosh,
>It would be helpful if someone could tell me how to write
>a win32 c/cpp console program that can change the current
>folder of the shell window where it is called ?
I am afraid a general purpose solution is simply not available.... win32
applications maintain a per process current directory.
There are many fixes... like using a batch file for example, but no simple
method as such to perform this under win32.
But I have given below a rather different method to achieve what you are
looking for..., the pros are that it doesn't require any extra batch or dos
exe file to function. The cons this method in its present form would only
be suitable for a console program that would terminate immediately after
executing this function. Also expect a few focus issues which can happen.
Although I have not included the specific code for that, it is advisable to
set the focus or attach the input for the console thread before performing
this, otherwise the keys might end up in the wrong window :-).
In a nutshell, the function uses the keybd_event() func to send a "cd dir"
command and then terminates. This results in a change directory being
executed by the dos prompt and you end up where you wanted to be :-).
The code in the present form has been tested working under 98/nt/2000. It
should work under the other versions of windows also. Hope this does
provide a solution to what you are looking for...
#include <windows.h>
#include <stdio.h>
void SendKeypress (char ch)
{
unsigned short int vk, sc;
vk = VkKeyScan(ch);
sc = MapVirtualKey(vk, 0);
if (vk & 0x0100)
keybd_event(VK_SHIFT, MapVirtualKey(VK_SHIFT,0), 0,0);
if (vk & 0x0200)
keybd_event(VK_CONTROL, MapVirtualKey(VK_CONTROL,0), 0,0);
if (vk & 0x0400)
keybd_event(VK_MENU, MapVirtualKey(VK_MENU,0), 0,0);
keybd_event((unsigned char)vk, (unsigned char)sc, 0, 0);
keybd_event((unsigned char)vk, (unsigned char)sc, KEYEVENTF_KEYUP, 0);
if (vk & 0x0100)
keybd_event(VK_SHIFT, MapVirtualKey(VK_SHIFT,0),
KEYEVENTF_KEYUP,0);
if (vk & 0x0200)
keybd_event(VK_CONTROL, MapVirtualKey(VK_CONTROL,0),
KEYEVENTF_KEYUP,0);
if (vk & 0x0400)
keybd_event(VK_MENU, MapVirtualKey(VK_MENU,0),
KEYEVENTF_KEYUP,0);
}
bool SetConsoleDir (char *pDir)
{
int i;
char Buffer[256];
sprintf(Buffer, "cd %s\r", pDir);
for (i=0; Buffer[i] != '\0'; ++i)
SendKeypress(Buffer[i]);
return TRUE;
}
int main (int argc, char* argv[])
{
if (argc != 2)
return 1;
SetConsoleDir (argv[1]);
return 0;
}
Have a nice day,
Jayakrishnan K [MVP - Visual C++]
(Director)
Xtend Technologies (P) Ltd. Cochin.
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