Questions:
Please review the following code, which is supposed to connect to Excel currently running:
#include <windows.h>
#include <oleacc.h>
#import "C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\MSO.DLL" no_implementation rename("RGB", "ExclRGB") rename("DocumentProperties", "ExclDocumentProperties") rename("SearchPath", "ExclSearchPath")
#import "C:\Program Files (x86)\Common Files\microsoft shared\VBA\VBA6\VBE6EXT.OLB" no_implementation
#import "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" rename("DialogBox", "ExclDialogBox") rename("RGB", "ExclRGB") rename("CopyFile", "ExclCopyFile") rename("ReplaceText", "ExclReplaceText")
BOOL CALLBACK EnumChildProc(HWND hwnd, LPARAM)
{
WCHAR szClassName[64];
if(GetClassNameW(hwnd, szClassName, 64))
{
if(_wcsicmp(szClassName, L"EXCEL7") == 0)
{
//Get AccessibleObject
Excel::Window* pWindow = NULL;
HRESULT hr = AccessibleObjectFromWindow(hwnd, OBJID_NATIVEOM, __uuidof(Excel::Window), (void**)&pWindow);
if(hr == S_OK)
{
//Excel object is now in pWindow pointer, from this you can obtain the document or application
Excel::_Application* pApp = NULL;
pApp = pWindow->GetApplication();
pWindow->Release();
}
return false; // Stops enumerating through children
}
}
return true;
}
int main( int argc, CHAR* argv[])
{
//The main window in Microsoft Excel has a class name of XLMAIN
HWND excelWindow = FindWindow(L"XLMAIN", NULL);
//Use the EnumChildWindows function to iterate through all child windows until we find _WwG
EnumChildWindows(excelWindow, (WNDENUMPROC) EnumChildProc, (LPARAM)1);
return 0;
}
The truth is Excel really running in current moment, but AccessibleObjectFromWindow returns E_FAIL.
I also tried to run this code in a loop and switch to Excel to it focused application. The same story, AccessibleObjectFromWindow returns an E_FAIL.
I am now searching in the internet for an answer but all found before gave me nothing. So if someone could provide an explanation it would be greatly appreciated.
How to&Answers:
Found an answer from some code example:
int main( int argc, CHAR* argv[])
{
CoInitialize( NULL );
...
The problem is resolved with CoInitialize(NULL) call before starting work with any other objects.
