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Problem with DirectInput Mouse Control

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-------------------------------------------------------------------------------- Hi. I'm trying out following simple code which prints out the position of the mouse cursor when it's clicked. INT CGamePrepScreen::GetInput() { if ( m_LP_DIDevice_Mouse->GetDeviceState( sizeof( DIMOUSESTATE ) , ( LPVOID ) &m_Mouse_State ) != DI_OK ) { return ERR; } if ( m_LP_DIDevice_Mouse->GetDeviceState( sizeof( DIMOUSESTATE ) , ( LPVOID ) &m_Mouse_State ) == ( DIERR_INPUTLOST | DIERR_NOTACQUIRED ) ) { return m_LP_DIDevice_Mouse->Acquire(); } if ( m_Mouse_State.rgbButtons[0] & 0x80 ) { CHAR* testChar = new CHAR; RECT windowRect; POINT mousePoint; HRESULT ddrVal; GetWindowRect( m_Hnd_Parent_Window , &windowRect ); GetCursorPos( &m_Rel_Mouse_Position ); mousePoint.x = m_Rel_Mouse_Position.x - windowRect.left; mousePoint.y = m_Rel_Mouse_Position.y - windowRect.top; wsprintf( testChar, "Mouse x-coord is %d , Mouse y-coord is %d \n", mousePoint.x , mousePoint.y ); OutputDebugString( testChar ); } return 0; } And I call the function in the while loop like this: while (GetMessage(&msg, NULL, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } g_Game_Prep_Screen->GetInput(); } But whenever I click the mouse button there's one problem that causing me a headache. To my understanding, if ( m_Mouse_State.rgbButtons[0] & 0x80 ){ .. } <- this if statement should return true only if the mouse button is clicked. Then it should return false on other conditions. But whenever I click the mouse button only once, it returns true and when it loops back, it returns true again. So it thinks that I clicked the button twice. any ideas why it occurs? Thank you in advance.

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