Java HotSpot Virtual Machine

I have an application in Java accessing a VC++ dll for getting the text in a Internet Explorer Server component. I access the dll frequently once each second to get the latest content. It usually works fine and does what I want but sooner or later it crashes the program completely. I have tried to isolate the crash but can not find exactly what is going wrong. I also use some try..catch blocks and test all return values, but nothing seem to help. I am getting quite desperate by now so any help would be greatly appreciated!

Code as follows, I call the Java_poker_jni_ipoker_IPTHandler_getOutput() method once each second from the Java side, when it crashes I get the message �Exception thrown 1�, but nothing else�

JNIEXPORT jstring JNICALL
Java_poker_jni_ipoker_IPTHandler_getOutput(JNIEnv *env, jobject obj){

try {

LPTSTR str;

//init COM/OLE
if(CoInitialize( NULL ) != S_OK)
MsgBoxA("COM NOT INITED OK!");
else{
str = getText();
}

if(str == NULL){
MsgBoxA("STR = NULL");
str = "";
}else if(str == ""){
MsgBoxA("STR = ''");
}else if(!str){
MsgBoxA("NOT STR");
}

jstring res = env->NewStringUTF(str);

CoUninitialize();

//delete str;

return res;

} catch(...) {
LPTSTR str = "";
MsgBoxA("Exception thrown 1");
jstring res = env->NewStringUTF(str);
CoUninitialize();
return res;
}
}

LPTSTR getText(){

try {

CComPtr<IHTMLDocument2> spDoc;
CComPtr<IHTMLElement> pHTMLElement;

CComBSTR bstrText;
LPTSTR str = "";

HRESULT hr;

hr = GetHTMLDocument( chatWindow, spDoc );

if ( SUCCEEDED(hr) ){


hr = spDoc->get_body(&pHTMLElement);

if ( SUCCEEDED(hr) ){

hr = pHTMLElement->get_innerText(&bstrText);

if( SUCCEEDED(hr) ){
str =(char *)_bstr_t(bstrText);
}

}

}

//clean up
pHTMLElement.Release();
spDoc.Release();

return str;

} catch(...) {
MsgBoxA("Exception thrown 2");
}

return "";
}


HRESULT GetHTMLDocument( HWND hwnd, CComPtr<IHTMLDocument2> &spDoc )
{

try{

TCHAR lpszClass[512];
HRESULT hr;


if ( ::GetClassName(hwnd, lpszClass,(sizeof(lpszClass)/sizeof(TCHAR))-1) == 0 ){
return E_INVALIDARG;
}

if ( tcscmp(lpszClass, T("Internet Explorer_Server")) == 0 ){


LRESULT lRes;


::SendMessageTimeout( hwnd, nMsgGetHTML, 0L, 0L, SMTO_ABORTIFHUNG, 1000, (DWORD*)&lRes );

if ( pfObjectFromLresult != NULL ) {

hr = (*pfObjectFromLresult)( lRes, IID_IHTMLDocument2, 0, (void**)&spDoc );
CHECK_HR( hr );

}


}
else
{
hr = E_INVALIDARG;
}

//delete[] lpszClass;

return hr;

} catch(...) {
MsgBoxA("Exception thrown 3");
}

return E_INVALIDARG;
}