App related with file extension

[dominochmiel]

I need to know how can i connect my application with file extension. In short I need to now how to open graphic file in my app just clicking on file icon. Thanks for help.

 

[2ffat]

Look at the ShellExecute API. See faq101-1952 for more details and an example. James P. Cottingham

When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity.
[tab][tab]Albert Einstein explaining his Theory of Relativity to a group of journalists.

 

[butthead]

if the particular file type is associated with your program you can parse the command string that is passed to your program. I have a text editor that I made that checks arguments like this

char commandlinebuff [256];
WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR CmdLine, int)
{
strcpy (commandlinebuff, CmdLine);
}

the window OS will send a command such as
"yourprogram image.bmp"

this is how I handle it from the main form.cpp

if (strlen (commandlinebuff))
{
strcpy (buff1, ExtractFilePath(commandlinebuff).c_str ());

if (strlen (buff1))
chdir (buff1);

strcpy (loadedfilename, commandlinebuff);

OpenFile (loadedfilename);
}

you must change the file associations in the os before the Os will open the file with your program.

look up the parameter list for winmain in the help

tomcruz.net

 

[dominochmiel]

I used CmdLine and it's always empty.Maybe because I'm using win xp.In help i found under password CmdLine i found ParamStr but it gives me only directory to exe of my app.

 

[butthead]

ParamStr returns the parameter from the command line that corresponds to Index, or an empty string if Index is greater than ParamCount. For example, an Index value of 2 returns the second command-line parameter.

string1 = ParamStr(0)
string2 = ParamStr(1)
string3 = ParamStr(2)
stringN = ParamStr(N)

ParamStr has multiple values embedded
check the values of the above strings
sometimes you have to concatenate several
strings to get the full path name.

tomcruz.net

 

[dominochmiel]

Thanks butthead. It solved problem.