C++ using regkey for .html browser

[Cause]

Could someone supply a function to call the regkey and find the default brower stored there?

I've got a call to the users IE working, but want to make sure my scheme will work no matter what browser the user is using!

Thank You,

Cause :)

[oNyx]

You can just call:
rundll32.exe SHELL32.DLL,ShellExec_RunDLL <url>

You can also call local files like that. The effect is the same as double clicking em. So, with an mp3 it could for example spawn winamp or foobar.

[frozax]

I'm using ShellExecute:

ShellExecute( NULL, "open", url, 0, 0, SW_SHOWNORMAL );

[Cause]

Thank you to both of you,

Cause.

[milo]

To answer the original question:


class WebBrowser
{
public:
WebBrowser() { FindDefaultBrowser(); FindOpenCommand(); }
virtual ~WebBrowser();

virtual void OpenURL(const char* url);

protected:
void FindDefaultBrowser();
void FindOpenCommand();

string browser;
string command;
};

void
WebBrowser::FindDefaultBrowser()
{
HKEY hkey;
char value[256] = "";
DWORD dwSize;

ZeroMemory(value, 256);

if (RegOpenKeyEx(HKEY_CLASSES_ROOT,
".html",
0,
KEY_READ,
&hkey) == ERROR_SUCCESS) {

dwSize = 256;
RegQueryValueEx(hkey,
"",
NULL,
NULL,
(LPBYTE) value,
&dwSize);

RegCloseKey(hkey);

if (dwSize > 0) {
::Print("Default Web Browser: %s\n", value);
browser = value;
}
}
}


void
WebBrowser::FindOpenCommand()
{
HKEY hkey;
char value[256] = "";
DWORD dwSize;

ZeroMemory(value, 256);

if (RegOpenKeyEx(HKEY_CLASSES_ROOT,
browser + "\\shell\\open\\command",
0,
KEY_READ,
&hkey) == ERROR_SUCCESS) {

dwSize = 256;
RegQueryValueEx(hkey,
"",
NULL,
NULL,
(LPBYTE) value,
&dwSize);

RegCloseKey(hkey);

if (dwSize > 0) {
::Print("Browser Shell Open Command: %s\n", value);
command = value;
}
}
}


void
WebBrowser::OpenURL(const char* url)
{
if (url) {
char cmdline[256];

if (command.contains("%1")) {
strcpy(cmdline, command.replace("%1", url).data());
}
else {
strcpy(cmdline, string(command + " " + url).data());
}

STARTUPINFO s;
ZeroMemory(&s, sizeof(s));
s.cb = sizeof(s);

PROCESS_INFORMATION pi;
ZeroMemory(&pi, sizeof(pi));

if (CreateProcess(NULL, cmdline, 0, 0, 0, 0, 0, 0, &s, &pi)) {
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}
else {
::Print("Unable to launch web browser for url '%s'\n", url);
}
}
}



--milo