Can STM32F407VG's one pin set as Analog input in runtime ?

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Hi,I'm trying to read one channel ADC on STM32F4Discovery kit.I've closed DMA channel because i'm looking for basic ADC read that start an ADC channel wait for EADC_FLAG_EOC: End of conversion flag.
P.S:I use PA0 as digital input(button) ,read only PA1(Analog input channel 1),GPIOD's some pins are used as LEDs and here is my GPIO initialize routine.I use STD_Periph_Library

	  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_GPIOA, ENABLE);
 GPIOD_InitStruct.GPIO_Pin=GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
	GPIOD_InitStruct.GPIO_Mode=GPIO_Mode_OUT;
	GPIOD_InitStruct.GPIO_Speed=GPIO_Speed_100MHz;
GPIOD_InitStruct.GPIO_OType=GPIO_OType_PP;
	GPIOD_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
	GPIO_Init(GPIOD,&GPIOD_InitStruct);
 GPIOD_InitStruct.GPIO_Pin=GPIO_Pin_0;
	GPIOD_InitStruct.GPIO_Mode=GPIO_Mode_IN;
GPIOD_InitStruct.GPIO_OType=GPIO_OType_OD;
	GPIOD_InitStruct.GPIO_PuPd=GPIO_PuPd_NOPULL;
		GPIO_Init(GPIOA,&GPIOD_InitStruct);

So my problem is how can i make PA1 as analog input in runtime.I find a function but it changes AF register,i'm looking for changing MODER register and i can't find it.
void GPIO_PinAFConfig ( GPIO_TypeDef * GPIOx,
uint16_t GPIO_PinSource,
uint8_t GPIO_AF
)