The call is ambiguous: FindWindow(String, String);

Question

I am using this code:

IntPtr hwndf = this.Handle;
IntPtr hwndParent = FindWindow("ProgMan.exe", null);
SetParent(hwndf, hwndParent);

However I get an error. The error says :

The call is ambiguous between the following methods or properties: 'HyperBox.Form1.FindWindow(string, string)' and 'HyperBox.Form1.FindWindow(string, string)'

How can I fix this? Thanks.

Do you have 2 FindWindow methods? Those two look identical. Is your project configuration OK? — Wug, Nov 10 '12 at 00:25
Ah yes I had two separate methods that were different. Thanks alot. — Layne Wapp, Nov 10 '12 at 00:29

score -1 · Answer 1 · answered Nov 10 '12 at 00:37

-1

Cast null to string so that the program knows which of the overridden methods to use:

IntPtr hwndf = this.Handle;
IntPtr hwndParent = FindWindow("ProgMan.exe", (string)null);
SetParent(hwndf, hwndParent);

answered Nov 10 '12 at 00:37

JohnLBevan

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Both methods accept two string parameters. Casting null to a string will still be ambiguous. – Leon Newswanger Nov 10 '12 at 03:13
Ahh ok - if you have two methods with the same signature (i.e. same name & parameter types) that's the issue; the compiler has no way of differentiating so will reject it. A simple (hack) fix would be to change one of the parameters on one of the inputs to accept a character array or object instead of a string, then cast back to a string when you come to use it in the code. – JohnLBevan Nov 11 '12 at 16:09

The call is ambiguous: FindWindow(String, String);

1 Answers1