main.c

#include "windows.h"

/*
Command line options:

mouse buttons:
/L - left
/M - middle
/R - right

modes:
/H - hold
/T - trigger

parameters:
/P:20 - period=20 ms
/K:18 - keycode=18 ("Alt" key)
*/

#define IDC_BTN_LEFT			MOUSEEVENTF_LEFTDOWN
#define IDC_BTN_MIDDLE			MOUSEEVENTF_MIDDLEDOWN
#define IDC_BTN_RIGHT			MOUSEEVENTF_RIGHTDOWN
#define IDC_BTN_HOLD			100
#define IDC_BTN_TRIGGER			101
#define IDC_EDIT_PERIOD			102
#define IDC_EDIT_KEY			103
#define IDC_BTN_EXIT			104


#define LBL_BTN_LEFT			L"LEFT"
#define LBL_BTN_MIDDLE			L"MIDDLE"
#define LBL_BTN_RIGHT			L"RIGHT"
#define LBL_BTN_TRIGGER			L"TRIGGER"
#define LBL_BTN_HOLD			L"HOLD"
#define LBL_BTN_EXIT			L"X"

#define LBL_STC_PERIOD			L"PERIOD(ms)"
#define LBL_EDIT_PERIOD			L"16"
#define LBL_STC_KEY			L"KEY"
#define LBL_EDIT_KEY			L"18"

#define WND_CX				280
#define WND_CY				110

#define TOTAL_CONTROLS			10

#define NUMCHARS(p) (sizeof(p)/sizeof((p)[0]))

#define DLGCTL(a)		struct{DWORD style;	DWORD exStyle;	short x;	short y;	short cx;	short cy;	WORD id;	WORD sysClass;	WORD idClass;	WCHAR wszTitle[NUMCHARS(a)];	WORD cbCreationData;}

#define BUTTON(x,y,cx,cy,id,title)			{WS_VISIBLE|WS_CHILD|BS_DEFPUSHBUTTON|BS_MULTILINE, 0,(x)/2, (y)/2, (cx)/2, (cy)/2, id,	0xFFFF,	0x0080,	title, 0}
#define RADIO(x,y,cx,cy,id,title)			{WS_VISIBLE|WS_CHILD|BS_RADIOBUTTON, 0, (x)/2, (y)/2, (cx)/2, (cy)/2, id, 0xFFFF, 0x0080, title, 0}
#define STATIC(x,y,cx,cy,title)				{WS_CHILD|WS_VISIBLE,WS_EX_TRANSPARENT,	(x)/2, (y)/2, (cx)/2, (cy)/2, 0,  0xFFFF, 0x0082, title, 0}
#define EDIT(x,y,cx,cy,id,title)			{WS_CHILD|WS_VISIBLE,WS_EX_CLIENTEDGE,	(x)/2, (y)/2, (cx)/2, (cy)/2, id, 0xFFFF, 0x0081, title, 0}
#define LABELED_EDIT(x,y,cx,cy,id,label,value)	STATIC(x,y,cx,cy,label),	EDIT(x+90,y,cx,cy,id,value)

INPUT input[2];

#pragma	data_seg("Dlg")
static struct
{
	DWORD style; DWORD dwExtendedStyle; WORD ccontrols; short x; short y; short cx;	short cy; WORD menu; WORD windowClass;

	DLGCTL(LBL_BTN_LEFT)			button_left;
	DLGCTL(LBL_BTN_MIDDLE)			button_middle;
	DLGCTL(LBL_BTN_RIGHT)			button_right;
	DLGCTL(LBL_BTN_HOLD)			button_hold;
	DLGCTL(LBL_BTN_TRIGGER)			button_trigger;
	DLGCTL(LBL_BTN_EXIT)			button_exit;

	DLGCTL(LBL_STC_PERIOD)			static_period;		DLGCTL(LBL_EDIT_PERIOD)			edit_period;
	DLGCTL(LBL_STC_KEY)			static_key;		DLGCTL(LBL_EDIT_KEY)			edit_key;
} Dlg = 
{
	WS_VISIBLE|WS_POPUP|WS_BORDER,	0,	TOTAL_CONTROLS,	50/2,	50/2,	WND_CX/2,	WND_CY/2,	0,	0,

	RADIO(			10,				0,		80,		30,		IDC_BTN_LEFT,			LBL_BTN_LEFT),
	RADIO(			100,				0,		80,		30,		IDC_BTN_MIDDLE,		LBL_BTN_MIDDLE),
	RADIO(			190,				0,		68,		30,		IDC_BTN_RIGHT,		LBL_BTN_RIGHT),
	RADIO(			10,				50,		80,		30,		IDC_BTN_HOLD,			LBL_BTN_HOLD),
	RADIO(			190,				50,		80,		30,		IDC_BTN_TRIGGER,	LBL_BTN_TRIGGER),
	BUTTON(			WND_CX-22,			2,		20,		20,		IDC_BTN_EXIT,			LBL_BTN_EXIT),

	LABELED_EDIT(	10,			30,		80,		20,		IDC_EDIT_PERIOD,	LBL_STC_PERIOD,	LBL_EDIT_PERIOD),
	LABELED_EDIT(	10,			80,		80,		20,		IDC_EDIT_KEY,		LBL_STC_KEY,	LBL_EDIT_KEY)
};

HWND hWnd;
char tmp[MAX_PATH];
unsigned char trigger_mode;
unsigned char key = 18;
unsigned int period;

LRESULT CALLBACK WinProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
 	switch(msg)
    	{
		case WM_COMMAND:
			switch(LOWORD(wParam))
      			{
				case IDC_BTN_LEFT:
				case IDC_BTN_MIDDLE:
				case IDC_BTN_RIGHT:
					input[0].mi.dwFlags = wParam;
					input[1].mi.dwFlags = (wParam<<1);
					CheckRadioButton(hWnd,IDC_BTN_LEFT,IDC_BTN_MIDDLE,wParam);
					break;

				case IDC_BTN_HOLD:
				case IDC_BTN_TRIGGER:
					trigger_mode = (wParam==IDC_BTN_TRIGGER);
					CheckRadioButton(hWnd,IDC_BTN_HOLD,IDC_BTN_TRIGGER,wParam);
					break;

				case IDC_EDIT_PERIOD:
					period = GetDlgItemInt(hWnd,IDC_EDIT_PERIOD,(BOOL*)&tmp[0],0);
					break;

				case IDC_BTN_EXIT:
					exit(0);
			}
			break;
	}
    
    return DefWindowProc(hWnd,msg,wParam,lParam);
}

DWORD WINAPI InputThread(LPVOID argument_pointer)
{
	unsigned int active = 0;
	unsigned int key_state;
	unsigned int prev_key_state;

	while(1)
	{
		key_state = (GetAsyncKeyState(key)>>1);

		if (trigger_mode)
		{
			if ((key_state)&&(key_state!=prev_key_state))
				active^= 1;
			prev_key_state = key_state;
		}
		else
			active = key_state;

		if (active)
			SendInput(2,(LPINPUT)&input,sizeof(INPUT));
		Sleep(period);
	}

	return 0;
}

int WINAPI entry(HINSTANCE hInst,HINSTANCE hPrevInst,LPSTR lpCmdLine,int nShowCmd)
{
	MSG msg;
	HWND key_hWnd;
	static ACTCTX actCtx = {sizeof(ACTCTX),ACTCTX_FLAG_RESOURCE_NAME_VALID|ACTCTX_FLAG_SET_PROCESS_DEFAULT|ACTCTX_FLAG_ASSEMBLY_DIRECTORY_VALID,"shell32.dll",0,0,tmp,(LPCTSTR)124,0,0};
	static unsigned int arg_to_cmd[] = {IDC_BTN_HOLD,0,0,IDC_EDIT_KEY,IDC_BTN_LEFT,IDC_BTN_MIDDLE,0,0,IDC_EDIT_PERIOD,0,IDC_BTN_RIGHT,0,IDC_BTN_TRIGGER};
	char* i;
	unsigned int t;

	//enable visual styles
	GetSystemDirectory(tmp,sizeof(tmp));
	LoadLibrary("shell32.dll");
	ActivateActCtx(CreateActCtx(&actCtx),(ULONG_PTR*)&tmp);

	//create and init main dialog
	hWnd=CreateDialogIndirect(0,(LPCDLGTEMPLATEW)&Dlg,0,(DLGPROC)&WinProc);
	SendMessage(hWnd,WM_COMMAND,IDC_BTN_LEFT,0);
	SendMessage(hWnd,WM_COMMAND,IDC_BTN_HOLD,0);

	//parse command line
	i = (char*)GetCommandLine();
	while(*i)
	{
		if (*(i++)=='/')//looking for argument
			switch(*i)
			{
				case 'L':
				case 'M':
				case 'R':
				case 'H':
				case 'T':
					SendMessage(hWnd,WM_COMMAND,arg_to_cmd[*i-'H'],0);//send button command
					break;
				case 'P':
				case 'K':
					t = atoi(i+2);
					SetDlgItemInt(hWnd,arg_to_cmd[*i-'H'],t,0);
					if(*i=='P')
						period = t;
					else
						key = t;
					break;
			}
	}
	
	key_hWnd = GetDlgItem(hWnd,IDC_EDIT_KEY);

	CreateThread(0,0,InputThread,0,0,0);

	while(GetMessage(&msg,0,0,0))
	{	
		//hook keyboard events from IDC_EDIT_KEY
		if ((msg.hwnd==key_hWnd)&&
			((msg.message==WM_KEYDOWN)||
			 (msg.message==WM_KEYUP)||
			 (msg.message==WM_SYSKEYDOWN)||
			 (msg.message==WM_SYSKEYUP)))
		{
			key = msg.wParam;
			SetDlgItemInt(hWnd,IDC_EDIT_KEY,key,0);
			continue;//cancel message dispatch
		}

		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}