PC Toledo

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UINT SendInput(
  UINT    cInputs,
  LPINPUT pInputs,
  int     cbSize
);

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cInputs

Type: UINT

The number of structures in the pInputs array.

pInputs

Type: LPINPUT

An array of INPUT structures. Each structure represents an event to be inserted into the keyboard or mouse input stream.

cbSize

Type: int

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

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Type: UINT

The function returns the number of events that it successfully inserted into the keyboard or mouse input stream. If the function returns zero, the input was already blocked by another thread. To get extended error information, call GetLastError.

This function fails when it is blocked by UIPI. Note that neither GetLastError nor the return value will indicate the failure was caused by UIPI blocking.

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//**********************************************************************
//
// Sends Win + D to toggle to the desktop
//
//**********************************************************************
void ShowDesktop()
{
    OutputString(L"Sending 'Win-D'\r\n");
    INPUT inputs[4];
    ZeroMemory(inputs, sizeof(inputs));

    inputs[0].type = INPUT_KEYBOARD;
    inputs[0].ki.wVk = VK_LWIN;
    
    inputs[1].type = INPUT_KEYBOARD;
    inputs[1].ki.wVk = VK_D;

    inputs[2].type = INPUT_KEYBOARD;
    inputs[2].ki.wVk = VK_D;
    inputs[2].ki.dwFlags = KEYEVENTF_KEYUP;

    inputs[3].type = INPUT_KEYBOARD;
    inputs[3].ki.wVk = VK_LWIN;
    inputs[3].ki.dwFlags = KEYEVENTF_KEYUP;

    UINT uSent = SendInput(ARRAYSIZE(inputs), inputs, sizeof(INPUT));
    if (uSent != ARRAYSIZE(inputs))
    {
        OutputString(L"SendInput failed: 0x%x\n", HRESULT_FROM_WIN32(GetLastError()));
    }
}

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Minimum supported client 	Windows 2000 Professional [desktop apps only]
Minimum supported server 	Windows 2000 Server [desktop apps only]
Target Platform 	                Windows
Header 	                                winuser.h (include Windows.h)
Library 	                                User32.lib
DLL 	                                        User32.dll