CODEWITHSUNDEEP
c++windowswinapisendinput
Lendoria
Lendoria

Reputation: 147

SendInput wrong Parameter

I wanted to improve my SendInput() function but came across an error.

ERROR_INVALID_PARAMETER

87 (0x57)

The parameter is incorrect.

https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx

I am a bit confused which parameter should not be correct.

If I have forgotten something do not hesitate to ask.

INPUT in[6] = {0};

//Press Enter Key
in[0].type = INPUT_KEYBOARD;
in[0].ki.wScan = 0;
in[0].ki.dwFlags = 0;
in[0].ki.time = 0;
in[0].ki.dwExtraInfo = 0;
in[0].ki.wVk = VK_RETURN;

//release enter key
in[1] = in[0];
in[1].ki.dwFlags = KEYEVENTF_KEYUP;

//Hold Shift key and press key 7
in[2].type = INPUT_KEYBOARD;
in[2].ki.wScan = 0;
in[2].ki.dwFlags = 0;
in[2].ki.time = 0;
in[2].ki.dwExtraInfo = 0;
in[2].ki.wVk = VK_SHIFT;

in[3].type = INPUT_KEYBOARD;
in[3].ki.wScan = 0;
in[3].ki.dwFlags = 0;
in[3].ki.time = 0;
in[3].ki.dwExtraInfo = 0;
in[3].ki.wVk = 0x37;

//release key 7
in[4] = in[3];
in[4].ki.dwFlags = KEYEVENTF_KEYUP;

//release key shift
in[5] = in[2];
in[5].ki.dwFlags = KEYEVENTF_KEYUP;

if (SendInput(6, in, sizeof(in)) == 0)
{
std::cout << "Uppps some error in SendInput: " << GetLastError() << std::endl;
}

Upvotes: 1

Views: 657

Answers (2)

David Heffernan
David Heffernan

Reputation: 613582

The documentation says of cbSize:

The size, in bytes, of an INPUT structure. If cbSize is not the size of an INPUT structure, the function fails.

You are passing sizeof(in), the size of the entire array. Instead pass sizeof(INPUT).

Upvotes: 1

Lendoria
Lendoria

Reputation: 147

The size, in bytes, of an INPUT structure. If cbSize is not the size of an INPUT structure, the function fails.

SendInput(6, in, sizeof(INPUT));

Oups...

Upvotes: 7

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