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9.6

VC++ String Match & Sub String

Asked by shaf81 in Microsoft Visual C++.Net, C++ Programming Language, Windows MFC Programming

Tags: VC++, Command Line Param

Hello,

I have a small VC++ Program which would take a command line param and based on that, it would load an external program using create process.

The current code of the program is shown below. Lets assume the code is compiled into "code.exe", and lets says first param is called "--param1" and the second param is called "--param2"

when I execute:

>code --param1
then the GetCommandLine() is "code --param1"

>code.exe --param1
then the GetCommandLine() is "code.exe --param1"

The GetCommandLine() seems to give me exactly whats typed in the command prompt. However, what I'm interested is only in the parameter part. I would like to receive output as "--param1" for both conditions above.

I understand this could be done by finding the position of string "--" in the GetCommandLine() and then doing a sub string to extract everything to the left, however, I am finding difficult to do it on VC++, Data type mismatch errors and a lotta other caveats. Tried a few things, failed and now seeking yo experts help! :)


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#include<windows.h>
#include <iostream>
#include<string>  
#include <fstream>
#include <shlwapi.h>
#include <tlhelp32.h>
 
#include <direct.h>
#include <stdlib.h>
#include <stdio.h>
 
using namespace std;
string path;
string hold;
 
STARTUPINFO si;
PROCESS_INFORMATION pi;
 
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
 
{
    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );
   
    si.dwFlags = STARTF_USESHOWWINDOW;
    si.wShowWindow = SW_HIDE;
   
    char szCmd[256];
    lstrcpy(szCmd,GetCommandLine());
   
    if(0==lstrcmp("--param1",szCmd))
    {
        MessageBox(NULL, szCmd,"Going to Install",MB_ICONERROR);
        if(!CreateProcess(NULL,"program1.exe --install",NULL,NULL,FALSE,
            NORMAL_PRIORITY_CLASS,//CREATE_NEW_PROCESS_GROUP,
            NULL, NULL,&si,&pi))
    }
       
    if(0==lstrcmp("--param2",szCmd_2))
    {
        MessageBox(NULL, szCmd,"Going to Uninstall",MB_ICONERROR);
        if(!CreateProcess(NULL,"program1.exe -uninstall",NULL,NULL,FALSE,
            NORMAL_PRIORITY_CLASS,//CREATE_NEW_PROCESS_GROUP,
            NULL, NULL,&si,&pi))
    }
 
    return 0;
   
}
[+][-]09/07/09 02:22 PM, ID: 25277332Assisted Solution

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[+][-]09/07/09 02:31 PM, ID: 25277365Expert Comment

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[+][-]09/07/09 02:36 PM, ID: 25277381Expert Comment

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[+][-]09/08/09 12:59 AM, ID: 25279518Accepted Solution

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About this solution

Zones: Microsoft Visual C++.Net, C++ Programming Language, Windows MFC Programming
Tags: VC++, Command Line Param
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Solution Provided By: itsmeandnobodyelse
Participating Experts: 3
Solution Grade: A
 
 
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