[RESOLVED] How to get address of an selected image in string form

I have developed a form where i need to select an image from file explorer.
But, when i select an image using,

Code:

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objOpenFileDialog->ShowDialog();
System::String^ imgName = objFileDialog->FileName;

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it returns address in "String^" form.
Problem is that, i need in "String" to make some string operations like,

Code:

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string path = imgName;

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or

Code:

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Mat img = imread(imgName, CV_LOAD_IMAGE_GRAYSCALE);

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trim image full path to image name only etc...

How can i get path of an image in String format ???