7 files changed, 13 insertions, 8 deletions
diff --git a/indra/llwindow/llwindow.h b/indra/llwindow/llwindow.h
index 55b221e716..52132c38d3 100644
--- a/indra/llwindow/llwindow.h
+++ b/indra/llwindow/llwindow.h
@@ -160,7 +160,7 @@ public:
 	virtual void setLanguageTextInput( const LLCoordGL & pos ) {};
 	virtual void updateLanguageTextInputArea() {}
 	virtual void interruptLanguageTextInput() {}
-	virtual void spawnWebBrowser(const std::string& escaped_url) {};
+	virtual void spawnWebBrowser(const std::string& escaped_url, bool async) {};
 
 	static std::vector<std::string> getDynamicFallbackFontList();
 	
diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index 022b97f481..7026a3f7a6 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -3178,7 +3178,7 @@ S32 OSMessageBoxMacOSX(const std::string& text, const std::string& caption, U32
 
 // Open a URL with the user's default web browser.
 // Must begin with protocol identifier.
-void LLWindowMacOSX::spawnWebBrowser(const std::string& escaped_url)
+void LLWindowMacOSX::spawnWebBrowser(const std::string& escaped_url, bool async)
 {
 	bool found = false;
 	S32 i;
diff --git a/indra/llwindow/llwindowmacosx.h b/indra/llwindow/llwindowmacosx.h
index 7c6b324029..5ac74bb004 100644
--- a/indra/llwindow/llwindowmacosx.h
+++ b/indra/llwindow/llwindowmacosx.h
@@ -116,7 +116,7 @@ public:
 	
 	/*virtual*/ void allowLanguageTextInput(LLPreeditor *preeditor, BOOL b);
 	/*virtual*/ void interruptLanguageTextInput();
-	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url);
+	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url, bool async);
 
 	static std::vector<std::string> getDynamicFallbackFontList();
 
diff --git a/indra/llwindow/llwindowsdl.cpp b/indra/llwindow/llwindowsdl.cpp
index efa0110f8b..4d25b4134e 100644
--- a/indra/llwindow/llwindowsdl.cpp
+++ b/indra/llwindow/llwindowsdl.cpp
@@ -2465,7 +2465,7 @@ void exec_cmd(const std::string& cmd, const std::string& arg)
 
 // Open a URL with the user's default web browser.
 // Must begin with protocol identifier.
-void LLWindowSDL::spawnWebBrowser(const std::string& escaped_url)
+void LLWindowSDL::spawnWebBrowser(const std::string& escaped_url, bool async)
 {
 	llinfos << "spawn_web_browser: " << escaped_url << llendl;
 	
diff --git a/indra/llwindow/llwindowsdl.h b/indra/llwindow/llwindowsdl.h
index e6bdd46a77..8e65a2f324 100644
--- a/indra/llwindow/llwindowsdl.h
+++ b/indra/llwindow/llwindowsdl.h
@@ -125,7 +125,7 @@ public:
 	/*virtual*/ void *getPlatformWindow();
 	/*virtual*/ void bringToFront();
 
-	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url);
+	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url, bool async);
 	
 	static std::vector<std::string> getDynamicFallbackFontList();
 
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index 8df9dad581..d726c60018 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -2959,7 +2959,7 @@ S32 OSMessageBoxWin32(const std::string& text, const std::string& caption, U32 t
 }
 
 
-void LLWindowWin32::spawnWebBrowser(const std::string& escaped_url )
+void LLWindowWin32::spawnWebBrowser(const std::string& escaped_url, bool async)
 {
 	bool found = false;
 	S32 i;
@@ -2989,7 +2989,12 @@ void LLWindowWin32::spawnWebBrowser(const std::string& escaped_url )
 
 	// let the OS decide what to use to open the URL
 	SHELLEXECUTEINFO sei = { sizeof( sei ) };
-	sei.fMask = SEE_MASK_FLAG_DDEWAIT;
+	// NOTE: this assumes that SL will stick around long enough to complete the DDE message exchange
+	// necessary for ShellExecuteEx to complete
+	if (async)
+	{
+		sei.fMask = SEE_MASK_ASYNCOK;
+	}
 	sei.nShow = SW_SHOWNORMAL;
 	sei.lpVerb = L"open";
 	sei.lpFile = url_utf16.c_str();
diff --git a/indra/llwindow/llwindowwin32.h b/indra/llwindow/llwindowwin32.h
index 9d57735772..d4a3446515 100644
--- a/indra/llwindow/llwindowwin32.h
+++ b/indra/llwindow/llwindowwin32.h
@@ -114,7 +114,7 @@ public:
 	/*virtual*/ void setLanguageTextInput( const LLCoordGL & pos );
 	/*virtual*/ void updateLanguageTextInputArea();
 	/*virtual*/ void interruptLanguageTextInput();
-	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url);
+	/*virtual*/ void spawnWebBrowser(const std::string& escaped_url, bool async);
 
 	LLWindowCallbacks::DragNDropResult completeDragNDropRequest( const LLCoordGL gl_coord, const MASK mask, LLWindowCallbacks::DragNDropAction action, const std::string url );