Merge pull request #3143 from ab9rf/develop

update steam launcher

docs/changelog.txt

@@ -36,6 +36,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 ## New Plugins
 
 ## Fixes
+- Steam launcher now launches Dwarf Fortress via the Steam client
 
 ## Misc Improvements
 

package/windows/launchdf.c

@@ -2,15 +2,28 @@
 
 int WINAPI wWinMain(HINSTANCE hi, HINSTANCE hpi, PWSTR cmd, int ns)
 {
-    STARTUPINFOA si;
+    STARTUPINFOW si;
     PROCESS_INFORMATION pi;
 
     ZeroMemory(&si, sizeof(si));
     si.cb = sizeof(si);
     ZeroMemory(&pi, sizeof(pi));
 
-    if (CreateProcessA("Dwarf Fortress.exe",
-        NULL,
+    WCHAR steamPath[1024];
+    DWORD datasize = 1024;
+
+    LONG retCode = RegGetValueW(HKEY_CURRENT_USER, L"SOFTWARE\\Valve\\Steam", L"SteamExe", RRF_RT_REG_SZ, NULL, &steamPath, &datasize);
+
+    if (retCode != ERROR_SUCCESS)
+    {
+        MessageBoxW(NULL, L"Could not find Steam client executable", NULL, 0);
+        exit(1);
+    }
+
+    WCHAR commandLine[1024] = L"steam.exe -applaunch 975370";
+
+    if (CreateProcessW(steamPath,
+        commandLine,
         NULL,
         NULL,
         FALSE,
@@ -20,7 +33,7 @@ int WINAPI wWinMain(HINSTANCE hi, HINSTANCE hpi, PWSTR cmd, int ns)
         &si,
         &pi) == 0)
     {
-        MessageBoxA(NULL, "could not launch 'Dwarf Fortress.exe'", NULL, 0);
+        MessageBoxW(NULL, L"could not launch Dwarf Fortress", NULL, 0);
         exit(1);
     }