[Zz] use Windows default browser to open a webpage

The default key value of the windows browser is 'HKEY _ classes_root/htmlfile/Shell/Open/command' in the registry '.
The implementation code is as follows:

Void cxh1_dlg: onbtnweb ()
{
Hkey hkroot, hsubkey; // defines the root keyword and subkeyword of the Registry.
Char valuename [256];
Unsigned char datavalue [256];
Unsigned long cbvaluename = 256;
Unsigned long cbdatavalue = 256;
Char shellchar [256]; // defines the command line
DWORD dwtype;

// Open the Registry root keyword
If (regopenkey (hkey_classes_root, null, & hkroot) = error_success)
{
// Open the subkeyword
If (regopenkeyex (hkroot,
"Htmlfile // shell // open // command ",
0,
Key_all_access,
& Hsubkey) = error_success)
{
// Read the registry and obtain the command line of the default browser
Regenumvalue (hsubkey,
0,
Valuename,
& Cbvaluename,
Null,
& Dwtype,
Datavalue,
& Cbdatavalue );
// Call parameter (Home Address) Assignment
Strcpy (shellchar, (char *) datavalue );
Strcat (shellchar, "www.neaase.net /~ Xiaohui ");
// Start the browser
Winexec (shellchar, sw_show );

}
Else
MessageBox ("An error occurred while opening the web browser! "," Error ", mb_ OK );
}
Else
MessageBox ("An error occurred while opening the web browser! "," Error ", mb_ OK );
// Close the registry
Regclosekey (hsubkey );
Regclosekey (hkroot );
}